Iceberg Lake

Glacier National Park

Glacier + Northern Lewis Range, Montana

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Iceberg Lake


  • Looking ahead at the mountains right above the lake.- Iceberg Lake
  • Several falls along the trail.- Iceberg Lake
  • Getting closer to Ptarmigan Wall.- Iceberg Lake
  • Waterfalls below Iceberg Lake.- Iceberg Lake
  • Indian paintbrush next to the lake.- Iceberg Lake
  • Iceberg Lake.- Iceberg Lake
  • Close-up of the icebergs.- Iceberg Lake
  • Climb above the lake to the left for a better view.- Iceberg Lake
  • Swiftcurrent Valley.- Iceberg Lake
  • Fireweed next to the trail.- Iceberg Lake
  • Spring wildflowers along the trail with Mount Grinnell dominating the skyline.- Iceberg Lake
  • Lower Iceberg Lake partially thawed.- Iceberg Lake
  • Frozen Iceberg Lake.- Iceberg Lake
  • Snow along the trail in the middle of August.- Iceberg Lake
  • Wildflowers along the trail.- Iceberg Lake
  • Wildflowers along the trail.- Iceberg Lake
  • Iceberg Lake.- Iceberg Lake
  • A riot of wildflowers by Iceberg Lake.- Iceberg Lake
Overview + Weather
Unique view. Wildflowers. Accessible.
Glacier + Northern Lewis Range, MT
Pets allowed: 
Net Elevation Gain: 
1,200.00 ft (365.76 m)
Parking Pass: 
National Park Pass
Preferable Season(s):
Summer, Fall
Total Distance: 
9.70 mi (15.61 km)
Trail type: 
Trailhead Elevation: 
4,964.00 ft (1,513.03 m)
Current Local Weather:
Hike Description

Hike Description

Pro Contributor

Two of the more unique trails in Glacier National Park share the same starting section: Iceberg Lake and Ptarmigan Tunnel. Iceberg Lake sits at 6,094 feet and is flanked by Mount Wilbur, Iceberg Peak, and the Ptarmigan Wall. The steep mountains surrounding the lake allow snow and ice to accumulate and fall into the lake, which receives little direct sunlight as a result. This interesting geology creates a situation where the lake is known for having floating icebergs year round in most cases.

Begin the hike along the Ptarmigan Tunnel Trail, which branches off about halfway to the lake. The parking lot is shared with several trails and fills up early; if you can’t find a spot, you can park at the Swiftcurrent Motor Inn, which is just 0.2 miles further. Make sure to also carry bear spray and make lots of noise, as the first few miles are prime grizzly habitat. You’ll start by walking through the trees where there are a few open spots to look ahead and see how much of the hike remains. Many easy creek crossings will get you to the turnoff for Ptarmigan Tunnel, which makes a great extension in case you have extra time and energy on the way back. Turn left here and continue toward Iceberg Lake.

Along the final stretch of the hike to the lake, look down the valley to your left to see how far you’ve come. The forested canyon makes a great picture as the hillside is covered in wildflowers for much of the summer. Iceberg Lake itself is surrounded by fragile wildflower habitat, so take great care and obey the posted signs. If you are feeling brave, wading into the water (or diving in!) is something you’ll never forget. Come back the way you came after a well-deserved snack break while taking in the views.

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Field Guide

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Location + Directions

Nearby Camping + Lodging

(9 within a 30 mile radius)

Nearby Adventures

(50 within a 30 mile radius)

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