Arroyo Valle
Arroyo Valle or Arroyo Del Valle is a 36.4-mile-long (58.6 km) westward-flowing stream that begins in northeastern Santa Clara County, California, and flows northwesterly into Alameda County where it is dammed to form Lake Del Valle. After that Arroyo Valle is a tributary to Arroyo de la Laguna which in turn flows into Alameda Creek and thence to San Francisco Bay. In the past, the Arroyo Valle had a significant steelhead migration; however, degradation of the stream in the latter half of the 20th century has decimated this anadromous fish population.
| Arroyo Valle Arroyo De Los Taunamines | |
|---|---|
Arroyo del Valle in Pleasanton, California | |
Location of the mouth of Arroyo Valle in California | |
| Location | |
| Country | United States |
| State | California |
| Region | Santa Clara County |
| City | Pleasanton, California |
| Physical characteristics | |
| Source | Confluence of San Antonio Creek and Arroyo Bayo |
| • coordinates | 37°23′08″N 121°34′21″W |
| • elevation | 1,808 ft (551 m) |
| Mouth | Confluence with Arroyo de la Laguna |
• coordinates | 37°39′43″N 121°54′22″W |
• elevation | 302 ft (92 m) |
| Basin features | |
| Tributaries | |
| • left | Pino Creek, Sycamore Creek (Santa Clara County), Trout Creek (Santa Clara County) |
| • right | Spring Canyon Creek, Sulphur Gulch, Colorado Creek, Dry Creek, Eylar Canyon Creek, Lang Canyon Creek |
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