The Cosumnes River is a river located in California, flowing through the Sierra Nevada foothills and into the Sacramento-San Joaquin Delta. It spans approximately 80 miles and is known for its diverse ecosystems, including wetlands and riparian habitats. The river is an important resource for local wildlife and supports various recreational activities such as fishing, kayaking, and hiking. The Cosumnes River Preserve is a significant conservation area along the river, protecting its natural habitats and providing opportunities for public education and enjoyment. The preserve is home to numerous species of birds and other wildlife, making it a popular destination for nature enthusiasts and birdwatchers.