Blackfoot Glacier

Overview

Blackfoot Glacier sits high in the Lewis Range, south of Jackson Glacier. Once part of a single ice mass with Jackson, it has dramatically retreated and separated—an on‑the‑ground snapshot of the park’s broader glacier loss. It’s a powerful place to contemplate change: the park had around 150 glaciers in 1910; by 2015, only a few dozen met the “true glacier” threshold. USGS repeat photography of Blackfoot/Jackson makes that story painfully clear.

What You’ll See

This is a rugged, wild cirque etched into ancient Belt Supergroup rock uplifted along the Lewis Thrust. Expect the full glacial toolkit on display—U‑shaped valleys, moraines, tarns, arêtes. The glacier itself occupies a high basin that feels remote and austere, especially late season when seasonal snow peels back.

How to See It (Reality Check)

There’s no good roadside view. The Jackson Glacier Overlook shows Jackson, not Blackfoot. The closest maintained corridor is the Gunsight Pass Trail (St. Mary side near the Jackson Glacier Trailhead), but actually reaching Blackfoot’s basin typically requires off‑trail travel, creek fords, and unstable moraine/snow. That’s advanced terrain and not recommended for most visitors. If you want an excellent, safer glacier day hike on maintained trails, aim for Grinnell or Sperry instead. Distant glimpses of Blackfoot are possible from high routes like Piegan Pass on long traverses.

Safety and Hazards

• Water is the big hazard: swift, icy streams and slick rock are common near glacial basins. Don’t ford swift water.
• Snow/ice: late‑lying snowfields, hidden voids, and unstable bridges near the glacier. Don’t venture onto ice without mountaineering skills and gear.
• Weather changes fast—carry layers, rain protection, and navigation. Treat or filter any backcountry water.

Wildlife

This high country sees mountain goats and bighorn sheep, and the broader area is grizzly country. Hike in groups, make noise, carry bear spray where you can deploy it quickly, and keep at least 100 yards from bears and wolves (25 yards from other wildlife).

Nearby Logistics (Jackson/Blackfoot corridor)

• Restrooms: You’ll find vault toilets at Logan Pass, at a pullout just east of Jackson Glacier Overlook, and at Sun Point and Rising Sun. Use them when you can and carry your own TP/hand sanitizer.
• Parking: Going‑to‑the‑Sun Road parking fills early in summer—arrive early or late day.
• Camping: St. Mary Campground takes reservations; Rising Sun is first‑come when operating. Many Glacier Campground is closed through the 2025 season; don’t plan on camping there.

Best Time to Visit

Late July through September usually offers lower snow coverage and more reasonable creek levels. For long views from high passes, aim for clear afternoons when shadowing helps define the ice. Start early to secure parking and to build a generous safety margin for weather and route‑finding.