The San Joaquin River is one of California's major rivers, flowing approximately 366 miles through the Central Valley. It originates in the Sierra Nevada mountains and eventually merges with the Sacramento River, forming the Sacramento-San Joaquin Delta. The river plays a crucial role in the region's agriculture, providing water for irrigation and supporting various ecosystems. The river's watershed covers a diverse landscape, including forests, mountains, and valleys. It is home to several species of fish, including the endangered Chinook salmon. Efforts are ongoing to restore the river's health and improve water quality, benefiting both wildlife and local communities.