Deep Canyon-Coldwater Canyon
From the trailhead, the Deep Canyon Trail ascends rapidly and steadily for about three miles to the divide of the Wellsville Mountains at approximately 8,100 feet. The total elevation gain nears 3,000 feet. Some past hikers have dubbed the Wellsvilles the steepest range on earth, and new hikers will soon become believers.
Once on the ridge, keep an eye peeled for hawks. This range reportedly has more raptors winging by during migratory season than any other in America. Here, too, is one of the best places in Utah to get an overview of the northern region of the state.
To the west, the meanders of Bear River through cultivated land are clearly seen. The trail follows the crest of the divide south to Stewart Pass, contouring around Mendon Peak and Scout Peak on the way, and can be followed on down the ridge line of the Wellsvilles two miles to Box Elder Peak, the highest point, and on down to the Rattle Snake Trail.
From Stewart Pass, the Coldwater Lake Trail descends, knee-poundingly steep, about 1.5 miles to a tiny spot of water called Coldwater Lake. From there, it's less than a mile to the mouth of Coldwater Canyon, but a long hike back to the Deep Canyon Trailhead.
Much better to have a vehicle at both ends.