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> Spearfish Canyon
The Tunnel Wall is a small area that holds a handful of routes ranging from the great warmup, Doorf 5.9, to some burly steep climbs like Stress Test 5.12a and French Pinchler 5.13b. The area can be quite cool due to a constant breeze from the tunnel.
Walk left on the access trail for about 3 minutes until you encounter the obvious old mine tunnel covered by a wooden door.