San Lorenzo Creek

San Lorenzo Creek
Arroyo de San Salvador de Horta, Arroyo de la Harina^[1]^[2]
San Lorenzo Creek; Arroyo de San Salvador de Horta, Arroyo de la Harina
Etymology	Spanish
Native name	Arroyo de San Lorenzo (Spanish)
Location
Country	United States
State	California
Region	Alameda County
City	Hayward, California
Physical characteristics
Source
• location	east of Hayward, California
• coordinates
Source confluence	confluence
• location	at Palomares Creek and Eden Canyon Creek
• coordinates	37°41′45″N 122°01′33″W / 37.69583°N 122.02583°W
Mouth	San Francisco Bay
• location	Hayward Regional Shoreline
• coordinates	37°40′13″N 122°09′46″W / 37.67028°N 122.16278°W
• elevation	0 ft (0 m)
Basin features
Tributaries
• left	Crow Creek, Castro Valley Creek
• right	Sulphur Creek (diversion)

San Lorenzo Creek (Spanish: Arroyo de San Lorenzo) is a 10.7-mile-long (17.2 km)^[3] year-round natural stream flowing through Hayward, California and other neighboring unincorporated communities into San Francisco Bay at the Hayward Regional Shoreline.

Watershed

The creek begins in Castro Valley, and is the main tributary within the San Lorenzo Watershed, including the formerly independent Sulphur Creek, which had most of its flow diverted into San Lorenzo Creek in the 1960s to reduce the risk of flooding in downtown Hayward. Only in large flow events does some of the creek flow follow its old course into the Bay.^[4]^[5] The creek runs through the City of Hayward and the unincorporated communities of Cherryland, Ashland and San Lorenzo and empties into San Francisco Bay. A portion of the San Francisco Bay Trail runs along the mouth of the creek.^[6] The Cull Canyon and Don Castro reservoirs, both located within regional parks, feed into the creek.^[7]

History

The creek marks the farthest northward point of exploration by the Portolá expedition of 1769–70. Scouts camped at the creek before turning back to join the main party on the west side of the bay. Further explorations, led by Monterey presidio commander Pedro Fages in 1770 and 1772, also used the camp before continuing to the north.^[8]

From records dating to 1772, the creek was previously known to Spanish colonists as Arroyo de San Salvador de Horta, and Arroyo de la Harina. The current name for the creek, Arroyo de San Lorenzo, dates to at least 1812, and was recorded as such in land grants from 1841 and 1842.^[1]^[2]

El Camino Viejo now Mission Boulevard, passed through what is now San Lorenzo, California, crossing San Lorenzo Creek where Mission Boulevard crosses it now.

Ecology

San Lorenzo Creek historically supported steelhead (the anadromous form of the coastal rainbow trout Oncorhynchus mykiss irideus), ,^[9] and other salmonids.^[10] A 1997 paper states that, due to reasons tied to the ever increasing urbanization, dams, and their effect on the area, no sign of juvenile nor mature steelhead could be found in the creek.^[9] Since steelhead in the Bay Area and California's Central Coast were listed as threatened under the Endangered Species Act in 1997, numerous organizations, and governmental agencies have cooperated on restoration projects to allow migratory fish from the Bay to reach spawning habitat in various Bay Area watersheds.^[11]

References

^ ^a ^b Erwin G. Gudde; William Bright (2004). California Place Names: The Origin and Etymology of Current Geographical Names. University of California Press. p. 339. ISBN 978-0-520-24217-3. Retrieved 2011-01-15.
^ ^a ^b ^c ^d U.S. Geological Survey Geographic Names Information System: San Lorenzo Creek
^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 15, 2011
^ San Lorenzo Creek Watershed
^ San Lorenzo Creek: Neighboring Creeks
^ Bay Trail, San Leandro: San Lorenzo Creek to Marina Park Archived 2010-11-16 at the Wayback Machine
^ [1]^{[permanent dead link‍]}
^ Merriman, Frank; Brown, Alan K. (1969). Who discovered the Golden Gate? The explorers' own accounts, how they discovered a hidden harbor and at last found its entrance. San Mateo, Calif.: San Mateo County Historical Association. pp. 19–21. Retrieved 2017-09-16.
^ ^a ^b "ASSESSMENT OF STEELHEAD PRESENCE AND HABITAT IN SAN LORENZO CREEK WATERSHED; A University Thesis Presented to the Faculty of California State University, Hayward; By Lawrence Patrick Kobernus; December, 1998" (PDF). Retrieved 2018-01-11.
^ "Historic and Current Status of Fish in San Lorenzo Creek Watershed". 2003. Retrieved 2018-01-11.
^ Matthew Artz (2010-06-24). "Steelhead trout, salmon closer to Alameda Creek return". Oakland Tribune. Retrieved 2018-01-11.

External links

[Gudde-1] Erwin G. Gudde; William Bright (2004). California Place Names: The Origin and Etymology of Current Geographical Names. University of California Press. p. 339. ISBN 978-0-520-24217-3. Retrieved 2011-01-15.

[gnis-2] U.S. Geological Survey Geographic Names Information System: San Lorenzo Creek

[NHD-3] U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 15, 2011

[4] San Lorenzo Creek Watershed

[5] San Lorenzo Creek: Neighboring Creeks

[6] Bay Trail, San Leandro: San Lorenzo Creek to Marina Park Archived 2010-11-16 at the Wayback Machine

[7] [1]^{[permanent dead link‍]}

[8] Merriman, Frank; Brown, Alan K. (1969). Who discovered the Golden Gate? The explorers' own accounts, how they discovered a hidden harbor and at last found its entrance. San Mateo, Calif.: San Mateo County Historical Association. pp. 19–21. Retrieved 2017-09-16.

[Kobernus-9] "ASSESSMENT OF STEELHEAD PRESENCE AND HABITAT IN SAN LORENZO CREEK WATERSHED; A University Thesis Presented to the Faculty of California State University, Hayward; By Lawrence Patrick Kobernus; December, 1998" (PDF). Retrieved 2018-01-11.

[watershed-10] "Historic and Current Status of Fish in San Lorenzo Creek Watershed". 2003. Retrieved 2018-01-11.

[Dam-11] Matthew Artz (2010-06-24). "Steelhead trout, salmon closer to Alameda Creek return". Oakland Tribune. Retrieved 2018-01-11.

[1]

v t e San Francisco Bay watershed
Outline	Hydrography Ecology List of tributaries List of lakes
Subdivisions	Major San Francisco Bay Suisun Bay San Pablo Bay Minor Golden Gate Grizzly Bay Richardson Bay San Rafael Bay Richmond Inner Harbor San Leandro Bay Former Yerba Buena Cove Mission Bay
Waterways	Rivers San Joaquin Sacramento Napa Guadalupe Petaluma Creeks (discharging into the Bay) Alameda Baxter Cerrito Codornices Coyote (Santa Clara) Coyote (Marin) San Leandro San Lorenzo Schoolhouse Temescal Sausal Redwood San Mateo Sonoma Corte Madera Arroyo Corte Madera del Presidio San Rafael Miller Novato Tolay San Francisquito Pacheco Alhambra Adobe Rodeo Refugio Pinole Garrity Rheem Karlson San Pablo Castro Wildcat Fluvius Innominatus Marin (Alameda County) Strawberry Easton Mission Creek Reservoirs Calaveras Reservoir Lafayette Reservoir Straits and estuaries Clifton Court Forebay Carquinez Strait Oakland Estuary Raccoon Strait Sacramento–San Joaquin River Delta Stockton Deepwater Shipping Channel Watersheds Laguna Creek Watershed Guadalupe watershed
Parks and protected areas	Don Edwards National Wildlife Refuge San Pablo Bay National Wildlife Refuge Eden Landing Ecological Reserve Hayward Regional Shoreline Hayward Shoreline Interpretive Center Crown Memorial State Beach McLaughlin Eastshore State Park Emeryville Crescent State Marine Reserve Point Isabel Regional Shoreline César Chávez Park Brooks Island Regional Preserve Point Pinole Regional Shoreline Antioch Dunes National Wildlife Refuge Coyote Point Recreation Area Middle Harbor Shoreline Park National Estuarine Research Reserve China Camp State Park San Francisco Maritime National Historical Park SF Bay Trail Oyster Bay Regional Shoreline Big Break Regional Shoreline Palo Alto Baylands Nature Preserve
Islands and peninsulas	Major islands Alameda Alcatraz Angel Treasure Island Yerba Buena Minor Brooks Bair Bay Farm Belvedere Brother Castro Rocks Coast Guard Greco Hooks Island Mare Red Rock The Sisters Marin Islands Roe Ryer Seal Islands Peninsulas/infill Albany Bulb Brisbane Baylands Point Isabel Foster City Fleming Point Hunters Point Sierra Point Steamboat Point
Wetlands	Baylands Belmont Chelsea Cordelia Crissy Field Hoffman Meeker Mowry Napa Sonoma Point Molate Salt ponds Seal Stege Steinberger Suisun Westpoint
Bridges and tubes	Bridges San Francisco–Oakland Eastern span replacement Richmond–San Rafael San Mateo–Hayward Dumbarton Dumbarton Rail Bridge (inactive) Golden Gate Benicia–Martinez Antioch Carquinez Leimert Park Street Fruitvale High Street Bay Farm Island Tubes Posey/Webster Street Transbay
Ferries	Angel Island–Tiburon Ferry Blue & Gold Fleet Golden Gate Ferry San Francisco Bay Ferry (WETA)
Ports and marinas	Port of San Francisco Oakland Seaport Port of Richmond Hunters Point Naval Shipyard Mare Island Naval Shipyard Port of Redwood City Berkeley Marina Oyster Point Marina/Park Westpoint Harbor Foster City Marina (proposed)
Other	History Delta and Dawn Discovery Site Humphrey the Whale San Leandro Oyster Beds Richmond Shipyards U.S. Army Corps of Engineers Bay Model Harold Gilliam Marincello Ecology Golden Gate Biosphere Reserve Cosco Busan oil spill Thicktail chub Delta smelt Conservation and Development Commission The Watershed Project Save The Bay Citizens for East Shore Parks Friends of Five Creeks Urban Creeks Council 1971 oil spill Greenbelt Alliance The Bay Institute Reber Plan San Francisco Baykeeper San Francisco Estuary and Watershed Science Estuary Partnership Transportation Water Trail Transportation in the San Francisco Bay Area
Portal Category

Watershed

History

Ecology

See also

References

External links