can you name some rivers or lakes found here?
Sacramento River, San Joaquin River, Pit River, Feather River and Tuolumne River.
California
The most prominent river system within California is formed by the Sacramento River and San Joaquin River, which are fed mostly by snowmelt from the west slope of the Sierra Nevada, and respectively drain the north and south halves of the Central Valley. The two rivers join in the Sacramento–San Joaquin River Delta, flowing into the Pacific Ocean through San Francisco Bay. Many major tributaries feed into the Sacramento–San Joaquin system, including the Pit River, Feather River and Tuolumne River.

The Klamath and Trinity Rivers drain a large area in far northwestern California. 
how long does it take for a blue whale to give birth Gestation lasts 10–11 months. where are these type of whales mostly found? Monterey Bay, San Diego, Baja California Sur, Mexico; Gulf of St. Lawrence to name some. where is this bay located? On the coast of the U.S. state of California.
wiki:1621918
California [SEP] Rivers
The most prominent river system within California is formed by the Sacramento River and San Joaquin River, which are fed mostly by snowmelt from the west slope of the Sierra Nevada, and respectively drain the north and south halves of the Central Valley. The two rivers join in the Sacramento–San Joaquin River Delta, flowing into the Pacific Ocean through San Francisco Bay. Many major tributaries feed into the Sacramento–San Joaquin system, including the Pit River, Feather River and Tuolumne River. The Klamath and Trinity Rivers drain a large area in far northwestern California. The Eel River and Salinas River each drain portions of the California coast, north and south of San Francisco Bay, respectively.