The Coalition for the Upper South Platte:

An organization formed to protect the 2,600-square-mile watershed that reaches from the Continental Divide to Strontia Springs Reservoir, southwest of Denver. Working with volunteers, they plant thousands of trees each year, restore habitat, and improve recreational opportunities. Their crews also remove damaged and diseased trees, and help reduce the threats from wildfire upon our communities.

Their main website is http://www.uppersouthplatte.org/ External Link