Adobe Creek (near Los Altos, California)
Arroyo San Antonio (San Antonio Creek),
Arroyo de las Yeguas (Yeguas Creek)
Fallen Redwood in Adobe Creek. This large woody debris prevents erosion by slowing high flows and provides shelter for trout and other species
|Region||Santa Clara County|
|- left||Middle, West and North Forks Adobe Creek, Moody Creek, Purisima Creek, Robleda Creek, Barron Creek|
|Cities||Los Altos Hills, Los Altos, Palo Alto, California|
|Source||Black Mountain in the Santa Cruz Mountains|
|- location||Los Altos Hills, California|
|- elevation||2,600 ft (792 m)|
|Mouth||Palo Alto Flood Basin in southwest San Francisco Bay|
|- location||Palo Alto, California|
|- elevation||0 ft (0 m) |
Adobe Creek is a 14.2-mile-long (22.9 km) northward-flowing stream originating on Black Mountain in Santa Clara County, California, United States. It courses through the cities of Los Altos Hills, Los Altos, and Palo Alto. Historically, Adobe Creek was perennial and hosted runs of Steelhead trout entering from southwestern San Francisco Bay.
- History 1
- Watershed and course 2
- Habitat and wildlife 3
- The Palo Alto Flood Basin 4
Trails and Recreation 5
- The Adobe Creek Loop Trail 5.1
- Other Adobe Creek Trails 5.2
- See also 6
- References 7
- External links 8
The Ohlone people were the original inhabitants of Adobe Creek. A large shell mound which once had a group of Indian huts was found near Adobe Creek in Palo Alto. Evidence of a smaller settlement within Los Altos was uncovered in 1971, when an Ohlone burial ground with skeletons—one with ceremonial beads—was uncovered by new construction along Adobe Creek near O'Keefe Lane. The site had other artifacts, and an archeological dig was mounted by Foothill College. Around this same time, an Ohlone basket was discovered buried in the Creek bank further north. The O'Keefe site has a historical plaque marking the historic site.
On the 1862 Allardt Map the upper creek is called Arroyo San Antonio (San Antonio Creek) and the lower creek is called Arroyo de las Yeguas (Yeguas Creek). Yeguas is Spanish for "mare", and the Mission Santa Clara named it that because they built a corral for mares along the creek's banks near the Bay. Juan Prado Mesa renamed it San Antonio Creek when he was granted Rancho San Antonio in 1839 by Governor Juan Bautista Alvarado. The Adobe Creek name appears as early as 1855 on an official surveyor’s map, which lists both the Adobe and San Antonio names for the creek.
During the secularization of the missions in the 1830s, Alvarado parceled out much of their land to prominent Californios via land grants. Mesa was a soldier stationed at the Presidio of San Francisco who had become alfarez (officer in command) in 1837. He built a large square adobe, which lasted well into the twentieth century as a crumbling ruin long thought of as a fortification. The site today is on a hill on the southeast side of El Monte Avenue near Summerhill Avenue in Los Altos, California, most of which is located on the territory of the Rancho.
The upper creek originates in the historic Los Altos Hills, California was located on this Rancho. In 1844 Rancho La Purisima Concepcion was sold to Juana Briones de Miranda, whose family members had accompanied both the Gaspar de Portolà and the Juan Bautista de Anza Expeditions. Her uniquely constructed wood-framed, rammed-earth and adobe brick house, believed to have been built by American desertee sailors, is located at 4155 Old Adobe Road on the border between Palo Alto and Los Altos Hills, and is marked by a historical marker at the corner of Old Adobe Road and Old Trace Lane. Designated a California State Historical Landmark in 1954, the 160 year old Juana Briones home was scheduled for demolition in 2007 because of damage to it by the Loma Prieta earthquake in 1989. In 2009, it still stands and has been recently documented with a Historic American Buildings Survey (HABS).
After 1831, Mexican rancho owners would logically erect their dwellings on or very near creeks. Locally, Juan Prado’s adobe was near Adobe Creek & Juanita Briones’ adobe was near Barron Creek. Because they were permanent features of the landscape, creeks were often used as Rancho boundaries. This was true locally, where the Mexican diseño show Adobe Creek as the boundary between Rancho San Antonio and Rancho La Purisima Concepcion. When Americans took over in 1850, speculators bought much of this land. Much of it initially became large self-contained ranches---typically running cattle & growing crops like wheat, barley & oats that required little or no irrigation. That changed in a few decades when it was discovered that orchards and vineyards could thrive here. Such agriculture of course used more water. Local land was cut progressively into smaller holdings, until most of it was subdivided as the population increased. This meant more and more wells, including large ones dug along Adobe Creek by early water companies to serve the little town of Los Altos. The water table inevitably shrank as a result, and alarms about this development appeared, at least as early as the 1920s. In the early 1930s, the Los Altos News reported that the water table, which stood at 120 feet in 1898, was now down to 335 feet.
- Creation of living willow retaining wall/sculpture at Redwood Grove by Daniel McCormick and Mary O'Brien.
- Seeds of Change video documentary of Acterra restoration of Redwood Grove on Adobe Creek, by Blake Bowers
- "Adobe Creek".
- Adobe Creek Watershed maps page at Guide to San Francisco Bay Area Creeks
- Adobe Creek Upper Reach 5 Collaborative Effort (stream restoration)
- GreenTown Los Altos
- Hidden Villa home page
- Santa Clara County Creeks Coalition
- Santa Clara Basin Watershed Management Initiative (SCBWMI)
- Lower Peninsula Watershed Stewardship Plans
- Durham, David L. (1998). Durham's Place Names of California's San Francisco Bay Area: Includes Marin, San Francisco, San Mateo, Contra Costa, Alameda, Solano & Santa Clara counties. Word Dancer Press, Sanger, California. p. 591.
- "Palo Alto Creeks Topo, 1899". Oakland Museum. Retrieved 2010-11-07.
- William S. Cooper (January 1926). "Vegetational Development Upon Alluvial Fans in the Vicinity of Palo Alto, California". Ecology: 1–30.
- "Adobe Creek".
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 15, 2011
- Don McDonald (2010). Early Los Altos and Los Altos Hills. Arcadia Publishing. p. 20.
- Britton & Company (1862). Map of the San Francisco and San Jose Railroad : as located by the directors (Map). San Francisco.
- Chris D. Pilson (2009). Urban creek restoration, Adobe Creek, Santa Clara County, California, Master's Theses. Paper 3995 (Thesis). San Jose State University. p. 207. Retrieved 2012-02-24.
- Florence Fava (1976). Los Altos Hills: the Colorful Story.
- "Plat of the Rancho La Purisima Concepcion, finally confirmed to Juana Briones : Santa Clara Co., Calif. / As located by the U.S. Surveyor General". The Bancroft Library, University of California, Berkeley. Retrieved 2009-10-19.
- Douglas Kyle, Hero Rensch, Ethel Rensch, Mildred Hoover (2002). Historic spots in California, fifth edition. Stanford University Press, Stanford, California. p. 385.
- John Coté, Suzanne Herel (March 9, 2007). "160-year-old home can be demolished". San Francisco Chronicle. Retrieved Nov 10, 2009.
- "Protecting the Story of Juana Briones & Her California Gem". March 25, 2009. Retrieved Dec 12, 2009.
- "About Hidden Villa". Retrieved 2009-09-21.
- Jean Rusmore, Frances Spangle. Peninsula trails: hiking & biking trails on the San Francisco Peninsula. p. 198.
- "Los Altos Hills Historical Society: Resources". Retrieved Nov 10, 2009.
- "Adobe Fast Facts". Retrieved 2010-01-02.
- "Los Altos Town Crier". Losaltosonline.com. Retrieved 2011-10-06.
- Marino, Pam. (2011-10-04) Shoup House First Los Altos Property on National Register of Historic Places - Around Town - Los Altos, CA Patch. Losaltos.patch.com. Retrieved on 2013-07-21.
- "Adobe Creek Watershed Stewardship Plan". Santa Clara Valley Water District. Retrieved 2011-01-18.
- "West Fork Adobe Creek".
- Josephine W. Duveneck (December 1973). Hidden Villa Tales. California History Center, Foothill Community College District. p. 33.
- Jane Huber. "Hidden Villa Farm and Wilderness Preserve, Santa Clara County". Archived from the original on 25 October 2010. Retrieved 2010-11-06.
- Florence M. Fava (1976). Los Altos Hills, The colorful story. Woodside, CA: Gilbert Richards Publications.
- "Purisima Creek".
- "Adobe Creek Upper Reach Five: A Collaborative Effort". Retrieved 2009-10-18.
- K. Oven (5/26/2009). Santa Clara Valley Water District Board Agenda Memo (Report). http://cf.valleywater.org/About_Us/Board_of_directors/Board_meetings/_2009_Published_Meetings/MG36607/AS36620/AI36648/DO36685/DO_36685.PDF. Retrieved Dec 31, 2009.
- Sen, Dipankar; Van den Berg, Rob; Ndah, Tony; Nawbatt, Keiron (2005). "Geomorphic Restoration of Unstable Reach of Adobe Creek for Bankfull to Flood Frequencies based on Matching Velocities and Total Work on Stream Bed and Bank to Stable Reference Reaches". Proceedings of the Water Environment Federation: 3213–3229.
- Jean Rusmore, Frances Spangle, Betsy Crowder, Sue LaTourrette (2004). Peninsula Trails: Hiking and Biking Trails on the San Francisco Peninsula. Wilderness Press. p. 196.
- Santa Clara Basin Watershed Management Initiative (SCBWMI) Watershed Assessment Subgroup (August 2003). Watershed Characteristics Report - Chapter 7: Natural Setting (Report). Santa Clara Valley Urban Runoff Pollution Prevention Program. pp. 179. http://cf.valleywater.org/_wmi/_PDFs/Wcr/WCR2003R/Chapters/CH7Final.pdf. Retrieved 2012-08-11.
- Minutes of a Regular Meeting, Los Altos Hills Planning Commission (Report). Town of Los Altos Hills. 2005-08-11. http://www.losaltoshills.ca.gov/AgendaManager/uploads/planning-commission/1687.pdf. Retrieved 2011-04-14.
- "Barron Creek".
- "Description of Neighborhood (as wildlife habitat)". Barron Park Neighborhood Association. Retrieved 2010-08-21.
- "Description of Neighborhood as Wildlife Habitat, Natural Habitat Restoration/Preservation Activities, Barron Park (Neighborhood) Association". Retrieved Dec 19, 2009.
- Jana Seshadri (Oct 8, 2009). "City council signs agreement to restore Redwood Grove". Los Altos Town Crier.
- Eliza Ridgway (June 3, 2009). "Science learning, restoration in works for Redwood Grove". Los Altos Town Crier. Retrieved Jan 13, 2010.
- Nicholas Luther (2010-06-22). "City purchases land to connect Shoup Park, Redwood Grove". Los Altos Town Crier. Retrieved June 25, 2010.
- Charles Hallock (1877). The sportsman's gazetteer and general guide. p. 15. Retrieved 2010-08-29.
- Robert J. Behnke, Ted Williams (2007). Trout MagazineAbout Trout: The Best of Robert J. Behnke from. Globe Pequot. p. 6.
- "Oncorhynchus mykiss irideus, SU 4677". California Academy of Sciences. Retrieved 2012-12-02.
- John Otterbein Snyder, United States Bureau of Fisheries (1905). Notes on the fishes of the streams flowing into San Francisco Bay, California in Report of the Commissioner of Fisheries to the Secretary of Commerce and Labor for the fiscal year ending June 30, 1904 30. General Printing Office. p. 337. Retrieved 2010-10-23.
- Robert A. Leidy, Gordon Becker, Brett N. Harvey (2005). Historical Distribution and Current Status of Steelhead/Rainbow Trout (Oncorhynchus mykiss) in Streams of the San Francisco Estuary, California (Report). Center for Ecosystem Management and Restoration. p. 123. http://www.cemar.org/pdf/santaclara.pdf. Retrieved 2010-06-25.
- "Adobe Creek Restoration Project". Santa Clara Valley Water District. Archived from the original on 13 October 2010. Retrieved 2010-10-05.
- Edith Daley (1919-06-09). "Brook Starts Battle, Plutes Want Beauty, Plebes Want Utility". San Jose Mercury News.
- "Eleanor Cranston Cameron, Episode 10". Los Altos History Show, Los Altos Historical Commission. March 1988. Retrieved 2012-02-24.
- "Adobe Watershed, Santa Clara Valley Urban Runoff Pollution Prevention Program". Retrieved Nov 30, 2009.
- Robert A. Leidy (April 2007). Ecology, Assemblage Structure, Distribution, and Status of Fishes in Streams Tributary to the San Francisco Estuary, California (Report). San Francisco Estuary Institute. p. 188. http://legacy.sfei.org/leidy_No530/. Retrieved 2011-08-16.
- Robert A. Leidy (Sept-Oct, 2011). Fish sampling, Adobe Creek, Santa Clara County (Report). Environmental Protection Agency.
- Research Results Regarding the Fish Die-Off at Palo Alto Flood Control Basin (Report). City of Palo Alto Public Works Department Environmental Compliance Division. November 2002.
- John Jenks, David Crimp, C. Michael Hogan et al. (1976). Engineering and Environmental Evaluations of Discharge to the Coast Casey Canal and Charleston Slough (Report). Kennedy Jenks Engineers and Earth Metrics Inc..
- "Palo Alto Baylands Preserve". Archived from the original on 9 November 2010. Retrieved 2010-12-18.
Another "Adobe Creek Trail" is found in the Monte Bello Open Space Preserve, which is an easy to moderate 1.4 mile hike that begins on Montebello Road about 0.1 miles east of Page Mill Road and rejoins Montebello Road after traversing the headwaters of the West Fork Adobe Creek as well as a large meadow with spectacular view of the South Bay.
Hidden Villa is the starting point for the relatively gentle Adobe Creek Trail, an easy two mile hike upstream along a cool, wooded canyon where the creek still flows year-round. Two routes connect Hidden Villa to the Black Mountain Trail at Ewing Hill at 1,200 feet (370 m) of elevation, the Hostel Trail (1.3 miles) or the Creek Trail (1 mile) connecting to the Ewing Trail (0.3 miles). The Black Mountain Trail then continues up a strenuous 3 miles (4.8 km) to the 2,800-foot (850 m) summit of Black Mountain.
Many locals enjoy the natural setting of a short walk through Redwood Grove, of which portions are on an elevated wooden boardwalk. In 1986 the city of Los Altos was granted an open space easement on the south bank of Adobe Creek and developed a trail from the south end of Redwood Grove to the Manresa Lane Bridge.
Other Adobe Creek Trails
The Palo Alto Baylands Nature Preserve. The sailing station boat launching dock is visible on the opposite shore of the channel at the mouth of the former Palo Alto Yacht Harbor. Baylands Nature Preserve surrounds what used to be the Palo Alto Yacht Harbor, now a silted-in mud flat and marsh which provides excellent birding. The Adobe Creek Loop Trail then heads back southwest with Matadero Creek on the left and Byxbee Park (former landfill) and the active Palo Alto garbage dump on the right, eventually connecting to the Bay Trail at East Bayshore Road. Heading east along East Bayshore Road, turn immediately left after crossing over Adobe Creek to return on the Bay Trail to the San Antonio Road parking lot.
The Adobe Creek Loop Trail
Trails and Recreation
From November 16 to 20, 2002, approximately 100 Striped bass (Morone saxatilis), 5 Bat rays (Myliobatis californica) and 2 Leopard sharks (Triakis semifasciata) were found dead in the Flood Control Basin in both Adobe and Matadero Creeks within one mile of the tidegate. The fishkill was attributed to the first large rainstorm washing a large amount of leaf litter into the basin, leading to eutrophication and low dissolved oxygen. This is supported by the fact that the dead fish were all large (requiring more oxygen) at 2 to 4 feet long and the mouths and gills of the bass were fully extended open.
The Palo Alto Flood Basin was constructed in 1956 in order to prevent a repeat of the floods of 1955, when a high tide prevented the escape of heavy runoff from Matadero, Adobe, and Barron Creeks into the San Francisco Bay. The trapped runoff waters overflowed upstream creek banks and caused severe flooding in Palo Alto. In order to control the flow of water into the flood basin, a tidegate was placed at the confluence of Adobe Creek, Matadero Creek, and the San Francisco Bay, so that the flood basin could be maintained at approximately 2 feet below sea level, creating room to absorb floodwaters. The tidegate consists of several weirs and one operator-controlled sluice gate that enables tidal flows into the basin in order to improve water quality and for mosquito control. Three agencies oversee the tidegates: Santa Clara Valley Water District, City of Palo Alto, and Santa Clara County Vector Control. Because the trash grate and weirs separate the mouth of the flood basin from the San Francisco Bay estuary, large fish cannot swim freely between the Bay and the basin, unless the sluice gate is open. In addition, the tidegates are set to reduce tidal inflows into the basin, so that the basin is mostly freshwater. After a rainstorm the tidegate is kept closed, however this is precisely when steelhead trout in-migrations should occur. In 2002 a small opening was cut in the trash grate on the tidal gate to permit fish passage but local fisherman in the Flood Basin no longer report catching steelhead trout in recent years.
The Palo Alto Flood Basin
Four species of native fishes have been collected from Adobe Creek recently: California roach, Sacramento sucker, three-spined stickleback, and prickly sculpin. Leidy reported the fish still inhabiting the Adobe Creek's lowest reach in 2007 - native California roach (Lavinia symmetricus), Sacramento sucker (Catostomus occidentalis occidentalis), Three-spined stickleback (Gasterosteus aculeatus), and non-native Common carp (Cyprinus carpio), Rainwater killifish (Lucania parva), and Western mosquitofish (Gambusia affinis). A 2011 fish survey showed only native fish above El Camino Real: the reach above Redwood Grove and the Manresa Lane bridge in Los Altos included California roach, Sacramento sucker and Three-spined stickleback - an assemblage that generally includes steelhead trout in other Bay Area streams. Further upstream, the fish assemblage steadily diminishes due to passage barriers and reduced stream flows from diversions and wells: at Moody Road just above Foothill College, only California roach and Three-spined stickleback were collected, at Rhus Ridge bridge in Los Altos Hills only Three-spined stickleback were collected, and at the Francemont Avenue bridge and along the Adobe Creek Trail at Hidden Villa no fish were found.
Adobe Creek was once a perennial stream, as steelhead trout young spend their first year in fresh water and obviously cannot survive in streams that run dry seasonally. Historically, lawsuits were filed to prevent diversion of creek water for irrigation because they caused the creek to run "dry certain seasons of the year". A 1919 lawsuit against upstream creek diversion for "alfalfa fields" and "hog wallows" reads: "From time immemorial...the waters of Adobe Creek have flowed into, over upon and through the lands...from Hidden Villa high in the hills, past the wonderful home gardens of Los Altos to the Santa Clara Valley and on to the sea...Charles K. Field mourns the loss of the song of the brook that made his garden with its rockery an enchanted spot; Shoup's children can no longer wade in the stream, because there is no stream to wade in; acres and acres of McCutchen's rhododendrons are now languishing and dying with unsatisfied thirst." This written record confirms oral histories taken by local historian Don McDonald that Adobe Creek used to flow year-round. It is also consistent with Eleanor Cranston Fowle Cameron's (the sister of Senator Alan Cranston was born in 1909 and they lived on Cypress Court, north of West Edith Avenue in Los Altos Hills) account that in her youth the creek was perennial and that her "father fished the steelhead that ran up from the Bay to the pool below the waterfall".
Steelhead trout (Oncorhynchus mykiss) occurred historically in Adobe Creek based on a report touting the trout in the Sportsman Gazetteer in 1877. This very early report makes rumors that Adobe Creek's trout were introduced extremely unlikely since the first trout hatcheries in California did not propagate any trout until the 1870s, and much of their production was shipped to hatcheries out of state. A physical specimen was collected in 1893 by Stanford Biology Professor W. W. Thoburn and is in the California Academy of Sciences collection. In 1898 John Otterbein Snyder collected steelhead trout specimens in San Antonio Creek (now Adobe Creek). A 1909 land office brochure promoted Los Altos for its "never-failing mountain trout stream, trout caught a few feet from kitchen doors". The reaches upstream from Hidden Villa have been judged excellent trout spawning habitat. Josephine Duveneck wrote, "Before the era of concrete, fish used to swim up to spawn and native trout lured many a small boy to seek out the deeper pools carrying his home-made fishing pole and can of worms." Local historian Florence Fava also reported that "the creeks which lace the (Hidden Villa) property and join Adobe Creek were originally full of fish". Steelhead often were caught using large wet flies with 2x tippet during the early 1970s. Locations that held spawning steelhead included the large cement pieces downstream from the Foothill Junior College paint shop outflow and cut banks just below Interstate 280. According to the California Department of Fish and Game (CDFG), steelhead were caught by local fishermen during 1985, 1986 and 1987 in Mayfield Slough at the confluence of Matadero and Adobe Creeks. At least six steelhead were noted passing the tidal gates at Mayfield Slough in the Palo Alto Flood Basin in April 1987. There are many formidable obstacles to fish passage on Adobe Creek, including the culverts at the El Camino Real and Interstate 280 overpasses, a drop structure at the Foothill College bridge and the long concrete trapezoidal channel structure from El Camino Real northward to Highway 101. Additional barriers occur at the O'Keefe Lane and Hidden Villa bridges, and the creek suffers from significant bank erosion, failing channel stabilization structures, and sedimentation. Finally, the trash rack at the tidal gate at the mouth of Mayfield Slough is an intermittent complete barrier to fish passage when it is closed.
Existing native riparian trees include Willow ssp. (Salix ssp.), California sycamore (Platanus racemosa) in Redwood Grove and near the ranch manager's house at Hidden Villa, White Alder (Alnus rhombifolia) (one large specimen in Redwood Grove - see photo), Cottonwood (Populus) at the top of the Moody Creek tributary, Bigleaf maple (Acer macrophyllum), California buckeye (Aesculus californica), California Bay Laurel (Umbellularia californica) and California walnut (Juglans californica).
The creek also flows through Redwood Grove, a 5.9-acre (24,000 m2) nature preserve off University Avenue in Los Altos purchased by the city in 1974. In October, 2009 Los Altos contracted with Acterra to remove non-native plants and revitalize the redwood, oak woodland, riparian and grassland ecosystems by installing native plants, improving soil conditions, and creating habitat for wildlife such as bird houses and native bee boxes. The Coast Redwoods (Sequoia sempervirens) were transplanted by the Halsey family from a location on Summit Road in the Santa Cruz Mountains and replaced the native willows. At Manresa Bridge at the east edge of Redwood Grove one can see the native Red Willow (Salix laevigata) and Arroyo Willow (Salix lasiolepis) trees. The historic Halsey House, built in the late 1920s by Theodore and Emma Halsey, is a good example of Spanish Revival architecture. The city designated Halsey House a local landmark in 1981 and until recently it housed the Florence Fava collection of Coastanoan or Ohlone Indian artifacts from a creekside archeological excavation in Los Altos Hills (now moved to the Los Altos History House). On June 16, 2010 the Los Altos City Council finalized the purchase of 10,000 square feet (930 m2) of creekside property from Delbert and Marlene Beumer, who wanted to provide a safe pathway connecting Shoup Park and Redwood Grove.
Habitat and wildlife
In the 1800s the Baylands marshes ended between Alma and El Camino Real in Palo Alto, which explains why historical maps show area creeks appearing to terminate before they reach the Bay. Duck-hunting blinds were common in the nineteenth century along what is now Middlefield Road. The 1862 Allardt map shows Adobe Creek, then Yeguas Creek, having dual termini - one in the Baylands Marsh and the other to San Francisquito Creek just before entering San Francisco Bay.
After passing under Highway 101, Adobe Creek enters the Palo Alto Flood Basin just west of a levee at the end of San Antonio Road. This levee separates Charleston Slough on the east from Mayfield Slough on the west and is also the eastern border of the Palo Alto Baylands. The Flood Basin is maintained a couple feet below sea level in order to absorb floodwaters from Adobe Creek and Matadero Creek. By lowering the basin, what was once tidal saltwater marsh is now predominantly freshwater marsh. Adobe Creek is joined by Matadero Creek at the north end of Mayfield Slough, where it historically joined with San Francisquito Creek before the latter was diverted north. Mayfield Slough has a tidal gate through which fresh water passes to San Francisco Bay, and some salt water is permitted to return to Mayfield Slough when the tides are higher.
Before passing under Highway 101, Adobe Creek is joined by Barron Creek just upstream of Highway 101. Barron Creek was alternatively known as Dry Creek, and appears as a tributary of Adobe Creek in the 1862 Allardt Map, although in the 1899 Topo Map it was tributary to Matadero Creek, and was much later diverted back to Adobe Creek. Barron Creek is 5.8 miles (9.3 km) long, originating in the Los Altos Hills foothills at elevation 360 feet (110 m) along La Paloma Road (just north of Alta Tierra Road), then flowing north along La Paloma Road, then it is joined by a Concepcion Road fork at Fremont Road and proceeds along Fremont Road behind Pinewood School, before turning northeasterly along Arastradero Road where it is joined by another minor fork originating in Esther Clark Park. After crossing Foothill Expressway it is buried in an underground pipe just west of Gunn High School but sees daylight where the creek crosses Bol Park Bike Path in a small, man-made flood control basin, then at Laguna Avenue again enters an underground pipe running beneath Los Robles Avenue to El Camino Real. Barron Creek has been greatly modified for flood control purposes; the creek bed downstream from El Camino Real is a concrete trapezoidal channel.
Several sections of Adobe Creek have been re-aligned, including the trapezoidal concrete drainage channel between El Camino Real and U.S. Highway 101 (the portion between Alma Street and El Camino Real was constructed by the SCVWD in 1959). Also, in 1956, Pink Horse Ranch developer Wendell Roscoe, re-directed Adobe Creek into a new straight line channel next to Moody Road that he dug to redirect the water along the edge of his subdivision "in order to prevent a repeat of two 100-year floods which left the 40 acre Pink Horse Ranch under 2 feet of water". Roscoe installed a flood gate at 12243 Tepa Way which can redirect the flows into the old Adobe Creek channel. In 1975, an 8-foot pipe bypass intended to prevent flooding of properties along Adobe Creek was constructed starting near the intersection of Moody and El Monte Roads (on the Foothill College Campus) going upstream approximately 2,200 feet, ending just upstream of Tepa Way. The original creek channel is now a secondary water "bypass channel" that bears high winter water flows from Adobe Creek and meanders through several properties in the Adobe Lane subdivision before passing under Moody Road and returning to the mainstem at the southeast corner of Foothill College.
Further downstream, the Palo Alto/Los Altos bike path traverses the creek, running along the Hetch Hetchy Aqueduct right of way.
From 2003 to 2009, Upper Reach 5 of Adobe Creek (between Foothill Expressway and West Edith Avenue) was restored in an innovative partnership called the Adobe Creek Watershed Group with representatives from the Santa Clara Valley Water District, local residents and representatives of the City of Los Altos and the Town of Los Altos Hills. The $7.2 million project improved flood conveyance capacity in Reach 5, and also enhanced the creek ecosystem by removing the existing concrete banks and bottom, repairing and stabilizing the eroded banks using minimal hardscape, removing many non-native trees, and establishing a riparian area along 700 feet (210 m) of bank using mostly shrubs and trees native to the Adobe Creek watershed, as well as non-native California Redwoods. 
Below the confluences of the "three forks", Adobe Creek is joined by three seasonal creeks in Los Altos Hills. The first is 1.3-mile-long (2.1 km) Moody Creek (known locally as Silver Creek) named for George Washington Moody, who built Moody Road in 1867, and whose home was located on Moody Creek (which flows down along Central Drive and then Moody Court to its confluence with Adobe Creek). Next comes 2.0-mile-long (3.2 km) Purisima Creek (historically known as Purissima Creek and originating between Altamont Road and Dezahara Way and joining Adobe Creek at Deepwater Lane and Bay Tree Lane) and Robleda Creek (along Robleda Road) in Los Altos Hills. Thence, Adobe Creek departs mountainous and hilly terrain and enters the valley floor to descend through Los Altos, Mountain View and Palo Alto. The creek's course runs 11 miles (18 km).
Adobe Creek's upper tributaries are, in order, the Middle Fork Adobe Creek, then immediately the West Fork Adobe Creek (the West Fork is known locally as Letcher Creek). Next the North Fork Adobe Creek (originating on Page Mill Road near "Shotgun Bend" at an elevation over 1500 feet) joins Adobe Creek by the Duveneck's main house at Hidden Villa. The North Fork Adobe Creek is also known locally as Bunny Creek. The upper watershed of Adobe Creek is completely protected by Hidden Villa and the Mid-Peninsula Regional Open Space District.
Watershed and course
The founder of Los Altos, Paul Shoup picked a premium lot on Adobe Creek for his home from the ranch lands he helped purchase from Sarah Winchester that later became the community of Los Altos. The Paul Shoup House on Adobe Creek is the first property in Los Altos to be listed on the National Register of Historic Places.
Adobe Creek Lodge, an English country-style mansion, was built by Consolidated Chemicals vice-president Milton Haas in 1935. It was a destination resort in the 1940s. Bandleaders Jimmy Dorsey and Harry James played there.
The Juan Prado Mesa Preserve in Los Altos Hills between Dawson Drive and Stonebrook Road, and Hale Creek and Neary Quarry was created in 1970 and named for the original holder of the land grant.