|American River Conservancy||conducts conservation, education, and stewardship programs to protect and enhance native fisheries, vanishing plant and animal communities, scenic vistas, cultural heritage and recreational lands within the American and Cosumnes River watersheds which lie in the foothills of the eastern Sacramento Valley.|
|ASRA Canyon Keepers||provides guides (and more) for trails in the Auburn State Recreation Area.|
|Foresthill Trails Alliance||is a nonprofit community organization whose purpose is to preserve, maintain and develop multi-use trails on the Foresthill Divide and to work in conjunction with other groups that promote and preserve multi-use trails throughout California and the United States.|
|Get Off Your Gass||purpose is to promote hiking in the American River Watershed. This is the area between the North and South Forks of the American River.|
|North Fork American River Alliance||is a nonprofit organization created to protect and preserve the natural, cultural and historic beauties of the North Fork American River Canyon.|
|Meadow Vista Trails Association||
is dedicated to maintaining and establishing safe walking, running, biking and equestrian trails throughout Meadow Vista -- and the neighboring communities of Christian Valley, Clipper Gap, Applegate, and Weimar -- for the benefit, health and enjoyment of the community while preserving the integrity of the environment.
Website has excellent information on many lesser known trails in the lower part of the canyon.
|Placer Land Trust||is a community-based private nonprofit organization dedicated to preserving lands that hold valuable natural, historic, agricultural, and recreational resources in Placer County, California.|
|Protect American River Canyons||Auburn-based grassroots educational group dedicated to the preservation of the wilderness, recreational, cultural, and historical resources of the North and Middles Forks of the American River and its canyons for all to responsibly care for and enjoy.|