Miles Canyon and Suspension Footbridge is six miles upstream from Whitehorse on the Yukon River. Miles Canyon is a slash in the earth where green water swirls past multi-colored cliffs of volcanic rock. You can reach the canyon and a suspension footbridge by taking a side road branching off the Alaska Highway at km 1467/mile 912. Cross the bridge and take the path to the right to reach the site of Canyon City, where gold rush stampeders off-loaded boats and scows to portage freight around Whitehorse Rapids.