Iceberg Lake: One of Glacier National Park's Most Stunning Hikes

Hiking to Iceberg Lake in Glacier National Park is one of the most scenic and popular hikes in the Many Glacier area, leading hikers through flower-filled alpine meadows, beneath towering cliffs, and into the heart of one of Montana's most spectacular mountain landscapes. The Iceberg Lake Trail offers incredible opportunities to spot wildlife, including bighorn sheep, mountain goats, moose, marmots, and even grizzly bears, while providing nonstop views of Glacier National Park's jagged peaks and glacially carved valleys. The trail culminates at the stunning turquoise waters of Iceberg Lake, where chunks of floating ice often remain well into summer after breaking away from the surrounding snowfields. With unforgettable scenery, abundant wildlife, and one of the most beautiful alpine lakes in the park, hiking to Iceberg Lake is a must-do adventure for anyone visiting Glacier National Park.

Trailhead elevation 4,961'

Water filterable from Ptarmigan Falls area, Iceberg Creek, and Iceberg Lake

Don't miss exploring the spur trails surrounding Iceberg Lake

Hiking to Iceberg Lake

Parking for the Iceberg Lake Trail is located at the Iceberg–Ptarmigan Trailhead, immediately behind the Swiftcurrent Motor Inn in the Many Glacier area. The trailhead parking lot is one of the park's largest, accommodating nearly 200 vehicles, but it routinely fills by early morning during the summer due to the popularity of Iceberg Lake, Ptarmigan Tunnel, and Swiftcurrent Pass. Overflow parking is available along the adjacent Swiftcurrent Motor Inn parking areas, although these spaces also fill quickly on busy days, with hikers tackling Grinnell Glacier. During peak season (late June through Labor Day), arriving no later than 7:00 a.m. offers the best chance of securing a parking space while also increasing the likelihood of spotting wildlife during the morning hours.

The hike begins behind the Swiftcurrent Motor Inn, where a paved road leads hikers past several national park employee cabins before reaching the official trailhead a short distance later.

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Once at the official trailhead, the well-marked path heads into the forest toward both Iceberg Lake and Ptarmigan Tunnel. The trail wastes little time immersing hikers in some of the most spectacular scenery in Glacier National Park. The well-maintained path climbs gradually through a mixed forest of Douglas-fir, spruce, and subalpine fir while following the western slopes of the valley.

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During the first mile, the trees frequently open to reveal impressive views across Swiftcurrent Valley toward the towering east face of Mount Grinnell, while the rugged cliffs of Mount Henkel, Mount Wilbur, and the Ptarmigan Wall begin to dominate the skyline ahead.

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Roughly 2.5 miles in, hikers pass one of the route’s most recognizable landmarks: Ptarmigan Falls. Here, Ptarmigan Creek tumbles nearly 30 feet through a narrow rock gorge before continuing toward the Swiftcurrent Valley. Although the falls are partially obscured by trees and only visible through occasional breaks in the forest, the sound of rushing water makes this a welcome stop along the trail—and a popular gathering spot later in the day. Just upstream from the falls, a footbridge crosses Ptarmigan Creek, offering hikers a great place to take a break and listen to the water rushing through the gorge below.

Past Ptarmigan Falls, the trail reaches a junction where the Ptarmigan Tunnel Trail branches to the right (there's a pit toilet nearby as well). Staying left toward Iceberg Lake, the scenery quickly becomes even more impressive as the walls of Iceberg Peak, Mount Wilbur, and the Ptarmigan Wall rise thousands of feet above the valley floor. In early and mid-summer, the hillsides explode with colorful wildflowers including glacier lilies, Indian paintbrush, beargrass, lupine, and fireweed, making this one of the park's premier wildflower hikes.

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Moose are frequently spotted feeding in the valley below, while bighorn sheep and mountain goats can often be seen high on the surrounding cliffs.

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The final half-mile traverses a broad alpine basin where Iceberg Creek meanders through lush meadows before disappearing beneath the cliffs that cradle the lake.

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As the trail rounds its final bend, Iceberg Lake suddenly comes into view, tucked beneath a towering natural amphitheater of near-vertical rock walls that rise roughly 3,000 feet above the water. It’s a breathtaking sight—and a well-earned reward after the hike in.

After a short descent, hikers arrive at the rocky shore of Iceberg Lake. Even during midsummer, massive chunks of snow and ice often break away from the surrounding cliffs and float across the lake's striking turquoise waters, giving it its memorable name. Hikers can follow trails along both sides of the lake, each offering a different perspective of one of the most beautiful lakes in Glacier National Park. While both are worth exploring, the trail along the right side of the lake offers the most impressive views.

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Although the glacier that once carved this cirque has long since disappeared, the lingering snow and floating ice provide a reminder of the immense glaciers that once filled the Many Glacier Valley, making Iceberg Lake one of the park's most unforgettable hikes.

When hikers are finished soaking in the scenery, they can simply retrace their steps back to the trailhead. Those looking for a bigger adventure, however, can continue on to Ptarmigan Tunnel, turning the outing into an unforgettable 16.5-mile day hike. Hikers who can comfortably handle the extra mileage should strongly consider combining the two, as experiencing Iceberg Lake and Ptarmigan Tunnel in a single day makes for one of the most rewarding hikes in the entire park.