what is the deepest river gorge in north america?
Exploring The âDeepest Canyon In North Americaâ. Eleven miles into the run, our feet teeter at the canyonâs rim. Our eyes tumble down the fall line, sliding through sun-gilded grassy slopes that plunge between chiseled rock walls. Far below, a delicate white line is the Snake River and its class V whitewater. âHat Point lookoutâ¦ our turn-around,â declares Mike, my partner on this trip through North Americaâs deepest canyon. Plunging 8,000 feet in just 10 miles, Hells Canyon is narrower, steeper and deeper than even the Grand Canyon.