The image of this craggy, 10,941-foot peak reflects on Pine Creek Lake, the mountain’s 32-acre pond set amid granite slabs. Don’t be fooled by the busy trailhead; most folks turn back at Pine Creek Falls, a mile in. The 4.4-mile, 3,400-vertical-foot approach to the lake means you’ll find isolated camp spots at the water’s edge, with plenty of solitude anytime but the busiest holiday weekends. Ascending Black Mountain itself makes for either a hardcore dayhike (from the trailhead) or a mellower overnight (from a camp on Pine Creek Lake). The summit push, another 1,900 vertical feet in 1.5 miles, is easiest in early summer (July), when corn snow still covers the route’s boulders. Pack an ice axe, gloves, and crampons for the straightforward, 35-degree snow gully—or trekking poles, stout boots, and good knees for a late-season climb—and turn south at tiny Jewel Lake, .1 mile north of Pine Creek Lake. From there, climb the snow- or talus-filled gully west of Black Mountain’s main bulk, and top out on the ridge after 1,300 vertical feet. Scan the neighboring peaks for bighorn sheep and mountain goats. To navigate around a cliff band, traverse southeast to an obvious drop-off above the second arm of the Y-shaped couloir that plunges to the north. Backtrack 20 paces, then drop 50 vertical feet off the ridge’s south side, and traverse to regain the now-broad summit ridgeline and stroll to the summit.
TO TRAILHEAD: 15 miles south of Livingston; 45.497510, -110.518727