
Place
Challenging

If you’re craving Glacier’s deep backcountry, this one delivers. Mokowanis Lake sits in the park’s far northeastern corner beneath the sheer east face of Pyramid Peak, reached by stitching together long, scenic corridors of the Belly River and Stoney Indian Pass trails. The most defined route clocks 26.6 miles total with about 5,554 feet of gain (out-and-back via the Waterton Valley/Stoney Indian Pass corridor)—a stout push most hikers break into a multi-day backpack. The shortest approach is from the Belly River Trailhead, about 14.4 miles one way to the lake; most parties return the same way for a roughly 28.8-mile round trip.
From the Belly River Trailhead, the path drops roughly 700 feet in the first two miles through forest and meadows, then cruises past the Belly River Ranger Station (~6.1 miles). A large seasonal suspension bridge carries you across the Belly River as you angle toward Cosley Lake and then Glenns Lake, where views explode toward Mount Merritt and Pyramid Peak. About a half mile beyond Glenns Lake (Head), turn at Mokowanis Junction and follow a final mile to Mokowanis Lake, where the cliffy wall of Pyramid Peak dominates the basin. Along the way you’ll thread turquoise waters and classic glaciated valleys; on clear days, Old Sun Glacier clings high on Mount Merritt’s flanks.
Prefer a big-pass experience? The Waterton Valley/Stoney Indian Pass route strings together Kootenai Lake and Stoney Indian Lake, crests the highly scenic pass, and continues to Mokowanis Junction before the short spur to the lake. It’s a longer day on paper (26.6 miles total, ~5,554 feet of gain), but the mountain drama over the pass is a highlight.
This is prime backpacking country with established backcountry sites. On the Belly River approach, Glenns Lake (Head) sits in a stellar spot; Mokowanis Junction is more utilitarian; and Mokowanis Lake offers a dramatic campsite beneath Pyramid Peak with a designated food-prep area and a pit toilet. On the Waterton/Stoney Indian approach, both Kootenai Lake and Stoney Indian Lake have backcountry camping. A backcountry permit is required for all overnight stays in these sites—plan your itinerary and secure a permit in advance or via walk-up when available.
The tread is generally well-maintained, but the lower sections can be extremely wet and muddy—stock use can churn the path into a mess, especially early season or after rain. Expect insects in season. Despite being well-traveled and easy to follow, this is truly remote country: mileages are big, the terrain is committing, and weather can flip fast.
Summer through fall is the sweet spot. High passes typically melt out by mid–late summer, and trails are drier by then. Early season brings lingering snow at elevation and sloppy lower miles. Start early for cooler temps and calmer light on the lakes; weekdays see fewer backpackers than weekends. If you’re eyeing the Waterton Lake boat approach for the Stoney Indian route, confirm schedules well ahead of time.
Access is either via the remote Belly River Trailhead off MT‑17 near the Chief Mountain border crossing, or from the Waterton Valley with a boat ride or long foot approach. Pack a reliable water filter, a rope and stuff sack for food hangs, and clean sleep clothes to avoid attracting bears. Gaiters are worth their weight in mud. If you’re venturing beyond the trail to climb peaks like Mount Merritt, helmet and (in summer snowfields) an ice axe can be prudent—only for experienced parties.
This is prime habitat for grizzly and black bears, and moose are commonly seen; mountain lions roam, too. Travel in groups, make noise, carry bear spray, and follow food-storage rules at backcountry sites. Give all wildlife plenty of space. Mountain weather changes rapidly—carry layers and be ready to pivot.
Park at the remote Belly River Trailhead off MT‑17 just south of the Chief Mountain Customs border crossing; limited facilities. Alternative access uses the Waterton Valley, which may require a boat ride or a long foot approach.
Very remote with big mileage; grizzlies, moose, and mountain lions present; seasonal suspension bridge on the Belly River; lower trail often wet and muddy from stock use; weather changes fast; backcountry permit required for overnight stays.
