Mark is a longtime supporter of river conservation and has generously made his images available to educational and environmental causes. "Our rivers are a precious natural and spiritual treasure, and we are their stewards." This is a short list of some of the organizations that help to protect and preserve rivers. Please consider a contribution to these groups that work to conserve our natural heritage.

Friends of the River
Friends of the River is nationally recognized as an authority on the adverse impacts of dams on rivers and ecosystems and is the most effective grassroots organization working on behalf of rivers. Friends of the River led successful campaigns for the permanent protection of many outstanding California rivers and streams - including the Kings, Kern, Merced, Tuolumne, upper Klamath, West Walker, East Carson, Sisquoc, and Big Sur Rivers; as well as Sespe Creek and Cache Creek.

American River Conservancy
The Conservancy's mission is to serve its community by protecting and enhancing natural habitats where biodiversity can flourish. Through education it promotes a broad ethic of stewardship, assuring healthy ecosystems now and for future generations. To date, the Conservancy has protected over 10,000 acres of fisheries, wildlife habitat, recreational lands and scenic vistas in El Dorado County. Since it's beginning in 1989, the Conservancy has provided meaningful, hands-on environmental education programs to over 65,000 children and adults through outreach programs to area schools and through the operation of the American River Nature Center within the Marshall Gold State Park in Coloma. The Conservancy also coordinates stewardship programs focused on monitoring water quality in local streams and rivers and enhancing endangered species habitat.