TrailIceberg Ptarmigan Trailhead
Iceberg Ptarmigan Trail: 9.6 mi RT, 1,210 ft gain to Iceberg Lake. Tough but rewarding.
1,210 ft elev. gain
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Saint Mary Falls Trail
Last Updated: December 2025
Distance
3.5 mi
Elevation Gain
238 ft
Est. Time
1.5-2 hours
Route Type
Out-and-back
Best Season
Summer (July–September)
Overview
About This Trail
Moderate 3.2-mile out-and-back to Saint Mary Falls in Glacier National Park. Expect 250 ft of elevation gain and sections of uneven, rocky terrain.
Highlights
Difficulty Level
Easy to Moderate
Hike If / Skip If
Best for hikers with moderate fitness seeking a scenic, non-technical outing. Suitable for families with older kids; the route has uneven ground and rocky patches. Plan 1.5–2.5 hours.
Trail Highlights
St. Mary Falls and Virginia Falls; views of St. Mary Lake and surrounding mountains
The Sweat Reality
Moderate hike: 3.2 miles round-trip with about 250 ft of elevation gain. The trail is primarily packed dirt with some rocky, uneven sections; plan 1.5–2.5 hours.
The Arrival Protocol
The trailhead lot is small and fills quickly. To improve your chances, arrive before 9:00 AM or after 3:30 PM. In peak season, use the free Going-to-the-Sun Road shuttle to reduce parking demand.
The Payoff
Photo spots include the waterfall near the end and views of St. Mary Lake along the route. Use a wide-angle lens for landscapes and a telephoto for detail; much of the trail runs through shaded forest.
Insider Tips
• Combine the hike to St. Mary Falls with Virginia Falls for a fuller experience. • Start before 8 am or late in the day to dodge crowds and sun. • If the main lot is full, use the Sunrift Gorge pullout and ride the free shuttle.
Best Season to Hike
Summer (July–September)
Hiking Tips
- Carry 2 liters of water minimum.
- Bear spray and knowledge of usage.
- Sturdy shoes, sun protection, insect repellent.
- Do not rely on cell service; carry map and compass.
- Trekking poles help on rocky sections near the falls.
Family Info
Family-friendly with caution near water and on slippery rocks
What Hikers Say
Hikers value the dual waterfalls and the short, easy-to-moderate hike. Crowds and parking are the main friction points, but the payoff is clear with views over St. Mary Lake and forest recovery after wildfire.
More at Glacier National Park
Trail Glacier National Park
Recommended Gear for Glacier National Park
ℹ️ Data Sources
Current time information in Flathead County, US. Google Reviews National Park Service YourNPGuide Editorial
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