The northern terminus of the Summerville Trail, 430, lies on Taylor River Road south of Lodgepole Campground at the Summerville Trailhead. The elevation of the trailhead is approximately 8,800 feet and the trail ascends gradually following Summerville Creek southward into the Fossil Ridge Wilderness. During the first one and a half miles of hiking the trail fords the stream six times. These are narrow stream crossings and most have log bridges.
Soon after the frequent stream crossings the trail leaves Summerville Creek ascending on a few switchbacks. There are two more sets of switchbacks during the next three miles of tread. Then the trail crosses a stream and continues ascending. Two miles from this stream crossing the trail passes the first of two unnamed lakes at approximately 11,320 feet. The next lake lies at 11,360 feet about one and a quarter miles south of the first lake.
Immediately before and after the second lake the trail hits a high point of 11,400 feet. It begins to descend into the Crystal Creek drainage after passing the second lake. One and a half miles after the lake the trail crosses Crystal Creek. It then ascends out of the drainage and crosses another small stream. The trail continues to ascend another mile to the junction with Fossil Ridge Trail, 430.
Directions from Almont: Travel ten miles northeast on Taylor River Road to the Summerville Trailhead.
Directions from Fossil Ridge Trail: Hike east or west on Fossil Ridge Trail to reach Summerville Trail.