Glacier National Park

Mt. Brown Lookout

strenuous Summit BaggersSolitude SeekersExperienced Hikers
5.2 mi Distance
4,325 ft Elevation Gain
Varies Estimated Time
one_way Trail Type

What to Expect

This trail doesn't ease you into anything. From the moment you leave the Sperry Trailhead near Lake McDonald Lodge, you're climbing — and you essentially never stop until you reach the lookout. Over five miles of relentless switchbacks, you'll gain more vertical than many peaks in the Rockies demand, grinding through dense forest that occasionally breaks open to reveal glimpses of Lake McDonald far below. The trail shares its first couple miles with the popular Sperry Chalet route before branching off and getting significantly steeper and lonelier. The forest transitions from cedar and hemlock to subalpine fir as you climb, and the final push delivers you to a historic fire lookout perched at nearly 7,500 feet with a jaw-dropping panorama of the McDonald Valley, Stanton Mountain, and the peaks of the Continental Divide. This is a trail for hikers who measure satisfaction in sweat and vertical feet — and who want to earn a view that most visitors never see.
Summit BaggersSolitude SeekersExperienced HikersEndurance JunkiesLookout Lovers

Safety Advisory

Grizzly bears are active throughout this drainage, especially in late summer when berry season peaks. Carry bear spray accessible on your hip, make noise on blind corners, and don't hike alone if you can avoid it.

The upper trail can hold snow and ice well into July, making the already steep grade treacherous. Microspikes are worth the weight if you're hiking before mid-July.

With over 4,300 feet of elevation gain in five miles, this trail has an average grade north of 15 percent. Hikers without strong cardiovascular fitness risk exhaustion, dehydration, or knee injury on the brutal descent. Know your limits before committing.

Trail Details

Distance 5.2 miles round-trip
Elevation Gain 4,325 ft
Difficulty strenuous
Estimated Time Varies
Trail Type one_way
Pets Not allowed
Season Year-round
Trailhead Mt. Brown Lookout

Pro Tips

Trail Tip

Start before 7 AM to beat afternoon thunderstorms and to have the lookout to yourself — this trail sees far less traffic than Sperry Chalet, but the few hikers who attempt it tend to cluster midday.

Trail Tip

Carry at least three liters of water per person. There are limited water sources on the upper mountain, and the unrelenting grade means you'll burn through hydration faster than you expect on a five-mile trail.

Trail Tip

The junction with the Sperry Chalet trail comes about 1.8 miles in — stay sharp and take the left fork. It's signed but easy to miss if you're in a rhythm. Missing it means extra miles before you realize your mistake.

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