"This is a climb to the summit of the highest peak (10,157 feet) in the Selway-Bitterroot Wilderness.
Until July, snow covers much of the trail.The almost 4,000 feet of elevation gain in 6 miles makes this hike hard but exciting because of the destination. From the top of Trapper Peak, the world falls away into endless cascades of rocky ridges. Trail 133 climbs abruptly from the parking lot, along the ridge above Boulder Creek to the south.The first part of the hike involves two steep climbs with a flat spot in between.The break is enough to lower your heartbeat a little. At early rest stops, take the extra time to walk the 20 feet to the edge of the ridge for a taste of the view from the top.The Boulder Creek Valley was formed by glaciation, creating a long, narrow, ice-gouged trough common to the eastern slope of the Bitterroots.
After the steep ascent in the first 2 miles, the trail climbs gradually. A little less than halfway up is a small spring to the right of the trail.The gurgling water is audible from the trail, and a small path veers off to the right. This is a good spot to replenish water bottles."