The Green River is an eligible Wild and Scenic River, a designated gene bank for winter steelhead populations, and provides excellent spawning habitat for endangered salmon.

The forests along the Green River contain some of the last remaining stands of old-growth trees in the area to survive the 1980 Mount St. Helens blast. These old-growth stands supply critical habitat for dependent terrestrial species.

Recreation opportunities along the Green River are abundant. The Green River Trail, Goat Mountain Trail, and Green River Horse Camp along this spectacular river are enjoyed by mountain bikers, hikers, horseback riders, hunters, and anglers.