San Lorenzo River
General data
- Name: San Lorenzo River
- Water system: Pacific Ocean
- Water type: River
- Progression: Monterey Bay -> Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
The San Lorenzo River (Spanish: Río de San Lorenzo) is a 29.3-mile-long (47.2 km) river in the U.S. state of California.
Its headwaters originate in Castle Rock State Park in the Santa Cruz Mountains and flow south by southeast through the San Lorenzo Valley before passing through Santa Cruz and emptying into Monterey Bay and the Pacific Ocean.