Trapper Peak is the highest summit in Montana's Bitterroot Mountains, a rugged 10,157-foot granite crown rising some 6,000 feet above the Bitterroot Valley near the town of Darby in the state's southwest corner. A strenuous but non-technical climb rewards hikers with staggering views across the Bitterroot and Sapphire ranges — a bucket-list summit for peak-baggers in western Montana.

The route follows Trail #133 from the Trapper Peak Trailhead, climbing roughly 6 miles with about 4,000 feet of elevation gain to the summit — a steep, demanding day hike. The first miles wind in and out of forest with growing views of Boulder Mountain and the peak ahead; the trees gradually give way to an open boulder field, and the final stretch works up toward the saddle and along the ridge above treeline to the top. The reach of the view from the summit is immense.

To reach the trailhead from Darby, head south on US Highway 93, turn west onto West Fork Road (State Highway 473), and follow it toward Forest Service Road 5630 and the trailhead. July and August are the prime months, as snow covers much of the trail before July.

Come prepared for a serious mountain hike: carry plenty of water (there is none along the trail), sun protection, layers for cool and windy high-country conditions, and sturdy footwear for the rocky upper slopes. Start early, watch for afternoon thunderstorms, and turn around if the weather turns. For fit hikers, standing atop the Bitterroots' highest point is an unforgettable Montana adventure.