Singleshot Mountain

Overview

Singleshot Mountain rises abruptly above the St. Mary side of the park and delivers the kind of wide-open views the east side is known for. There’s no signed trail or dedicated parking for Singleshot—this is an off‑trail, choose‑your‑own‑adventure objective. Most hikers skip the technical true summit and tag a prominent high point on Singleshot’s ridge for sweeping looks over St. Mary Lake and out to the Great Plains.

Common Ways to Reach It

• From Rising Sun via East Flattop: The most popular approach begins on the Otokomi Lake route from the Rising Sun area, then leaves the trail to gain Otokomi Mountain and traverse to East Flattop before continuing to Singleshot’s ridge high point. Expect a narrow, exposed “goat trail” section around East Flattop and airy terrain on the ridge. Strong parties sometimes link multiple summits (Otokomi → East Flattop → Singleshot → Napi Point) for a big day with significant elevation gain.
• Napi Point cutline: A straight “cutline” from the St. Mary Campground area leads to Napi Point. It’s steep, brushy, and littered with deadfall in places. From Napi Point, reaching Singleshot typically involves a roundabout traverse via East Flattop; a cliff band blocks an easy beeline to the true summit. Napi Rock nearby is a different feature and is a high Class 4 climb usually done with a rope.

Terrain and Hazards

Expect off‑trail travel on loose scree, steep grassy slopes, and sections of exposure along ridges. The rock on the true summit is notoriously poor—most parties avoid it without technical gear and experience. Ridges here are frequently windy, and early‑season snowfields can linger into June. Routefinding is part of the day; confidence on airy terrain is important.

Wildlife

Bighorn sheep commonly roam these ridges, and horned larks have been noted near East Flattop’s summit. Fresh grizzly diggings are sometimes seen in saddles—make noise in brushy areas, carry bear spray, and follow the park’s bear‑safety guidance.

Why Geology Nerds Love It

Singleshot is the type locality for the Singleshot Member of the Appekunny Formation—300–400 feet of argillites and quartzites interbedded with dolomite-rich layers from the ancient Belt Supergroup. You’ll see those classic Glacier color bands—greens, maroons, and reds—caused by iron minerals. The bigger picture here includes the Lewis Overthrust placing very old rocks atop younger ones, then glaciers carving the dramatic U‑shaped valleys you’re looking into.

Best Time to Visit

Aim for mid‑ to late summer once lingering snow melts. Start early for calmer conditions and to sort parking at east‑side trailheads, or use the park shuttle to stitch together a point‑to‑point traverse. Shoulder-season attempts can run into snow and ice on shaded slopes.

Logistics

There’s no dedicated trailhead or restroom for Singleshot—stage at established east‑side trailheads like Rising Sun (Otokomi Lake) or nearby stops along the Going‑to‑the‑Sun Road and then go off‑trail. Check current shuttle operations, area closures, and bear advisories before committing to the ridge.