Nacimiento RiverThe Nacimiento River (Spanish: Río Nacimiento) is a 64.8-mile-long (104.3 km) river in southern Monterey County and northern San Luis Obispo County, California. A large portion of the river's run is on military reservations. The river's upper reaches are inside Fort Hunter Liggett, Lake Nacimiento is in the middle and the lower reaches are inside Camp Roberts. It is the largest tributary of the Salinas River in terms of streamflow.Nacimiento RiverNacimiento River36.03194427490234-121.472503662109448310451115910467Los Burros Creek, Las Tablas CreekThe river downstream of Nacimiento Dam300including the Nacimiento RiverMap of the Salinas River watershed,300Unnamed springCountryState36.03194444444444 -121.4725The Nacimiento River (Spanish: Río Nacimiento) is a 64.8-mile-long (104.3 km) river in southern Monterey County and northern San Luis Obispo County, California. A large portion of the river's run is on military reservations. The river's upper reaches are inside Fort Hunter Liggett, Lake Nacimiento is in the middle and the lower reaches are inside Camp Roberts. It is the largest tributary of the Salinas River in terms of streamflow.below Nacimiento DamRío Nacimiento178.003211386104285.4912POINT(-121.47250366211 36.031944274902)