We set off on the Bonanza Mine Trail, 9 miles round trip, with 3800ft elevation gain ahead of us. It starts out steep, and then gets steeper. The reward comes when the trail emerges from the tree line, just past 2 miles in, onto a ridge that provides a panoramic view over the Kennecott Glacier moraines. The mine site itself is pretty spectacular. An old bunkhouse sits against the slope, just under the ridge. You can hike up further onto and along the ridge for even better views of the valley, including a glimpse of Root Glacier.