In Washington, it includes lands in Clark County within the boundary of the Columbia River Gorge National Scenic Area; In Skamania the CWMA extends northward along the Clark-Skamania County border to the USFS 90 road, where it travels east to Curly Creek road, along Curly Creek Rd E to USFS 30 road, then North to USFS 24 road along the border of Indian Heaven Wilderness continuing on USFS 24 road southeast to USFS Rd 8821, E. onto the USFS 88 road to the Klickitat county line. The border follows the northern Klickitat County line east to state highway 97 south where it meets the Columbia River, it includes the Wild and Scenic segments of the White Salmon and Klickitat Rivers.

In Oregon, the Columbia Gorge CWMA extends eastward along the Columbia River from its confluence with the Sandy River to the Deschutes River, then upstream to its intersection with Highway 216 and then westward to Highway 26, continuing westward until the town of Sandy, then north on Ten Eyck Road to where it meets the Sandy River.