Avalanche Lake vs Grinnell Lake: Which Hike Is Better?

Both trails are moderate and doable in a half-day. The main differences come down to location (west side vs. east side), crowd levels, and how much elevation and distance you want to cover. Per NPS.gov, Avalanche Lake is 2.3 miles one way with 741 ft of gain; Grinnell Lake is 3.9 miles one way with 462 ft of gain — or just 0.9 miles from the upper boat dock if you take the Glacier Park Boat Company ferry across Swiftcurrent Lake and Lake Josephine.

Avalanche Lake sits on the park's west side, accessed via Going-to-the-Sun Road roughly 5.5 miles east of Lake McDonald Lodge. The hike begins on the Trail of the Cedars — a paved, wheelchair-accessible boardwalk loop that passes through a cathedral of 500-year-old red cedars and western hemlock trees. This 0.8-mile boardwalk section is stunning on its own and requires almost no effort.

From the Trail of the Cedars junction, the Avalanche Lake Trail climbs steadily alongside Avalanche Creek through cool forest. The trail gains most of its 757 feet of elevation in the final mile before the lake. When you emerge from the trees, the payoff is immediate: a glacial cirque ringed by cliffs with multiple waterfalls (including Monument Falls) cascading hundreds of feet into vivid blue-green water.

Per NPS.gov, the lake sits at approximately 4,000 feet elevation and is fed by snowmelt from the alpine basin above. The lake is accessible from late June through October, depending on snowpack. It's consistently ranked among the top three most-hiked trails in Glacier — expect company. Parking warning: the Avalanche Creek parking area fills by 8–9 AM on summer weekends. If the lot is full, you may park at Lake McDonald Lodge and take a free park shuttle (when running), or park at a downstream pullout and walk the road — add 20–30 minutes each way.

Grinnell Lake is in the park's Many Glacier area on the east side — a 30-minute drive from the St. Mary entrance. The trailhead starts at the Many Glacier Hotel, one of the park's most iconic lodges. From here, the trail winds through subalpine forest and meadows before opening onto sweeping views of the Garden Wall ridge and the U-shaped glacial valley.

Grinnell Lake's famous turquoise color comes from rock flour — microscopic rock particles ground by the glacier and suspended in meltwater. Per HikingInGlacier.com, this suspended sediment scatters light in the blue-green spectrum, creating a color unlike any other lake in the park. Even the clear blue water at Avalanche Lake cannot match the vivid iridescence.

The standout option here is the boat shortcut. The Glacier Park Boat Company runs two consecutive ferries across Swiftcurrent Lake and Lake Josephine. Taking both boats cuts your round-trip hike from 7.8 miles to just 1.8 miles with minimal elevation gain — turning an all-day effort into a 1–2 hour outing suitable for young children. Boat tickets must be purchased in advance and often sell out in peak season. Boat ticket tip: book Grinnell Lake boat tickets through the Glacier Park Boat Company as early as possible — they sell out weeks in advance in July and August. Boats depart from behind Many Glacier Hotel across Swiftcurrent Lake, then connect to Lake Josephine for the second leg. Round-trip tickets are standard.

These two hikes look and feel completely different despite similar difficulty ratings. Avalanche Lake is a forest immersion — tall trees, filtered light, the sound of rushing water, and the cool damp air of old-growth cedar. The payoff is dramatic but enclosed: a cirque bowl that feels intimate rather than expansive.

Grinnell Lake is an alpine panorama. The trail opens up early and stays open, with views of glacier-carved peaks, the Continental Divide, and the Garden Wall — a jagged ridge dividing the park east to west. You can see Grinnell Glacier itself from the upper trail, a visual reminder that this landscape is still being actively shaped by ice. The lake comes into view well before you reach it, building anticipation.

If you're visiting Glacier for the first time and only have time for one hike, Avalanche Lake is the more reliable "wow" experience — it's shorter, more accessible, and still stunning. If you've done Avalanche before, or want the bigger landscape, Grinnell Lake is the upgrade.

Avalanche Lake has more elevation gain per mile (roughly 130 ft/mile) but is shorter overall. The Trail of the Cedars section is paved and flat — accessible to wheelchairs and strollers — but the Avalanche Lake trail itself is a natural dirt path with some roots and rocky sections. Suitable for most fitness levels; kids 6+ typically handle it well.

Grinnell Lake has less total elevation gain and a gentler gradient. The trail is wider and more open, with clear sight lines. The real differentiator is the boat option: with both ferries, the remaining hike to Grinnell Lake is only 0.9 miles each way with negligible elevation change — making it accessible for very young children or hikers with mobility limitations.

Avalanche Lake is one of the busiest trails in Glacier National Park. On peak summer days (July–August), the parking area fills by 8–9 AM. The trail itself can feel congested — hundreds of hikers make the trip daily. The lakeshore fills with groups by mid-morning. If you want a quieter experience at Avalanche, plan to arrive at or before sunrise.

Grinnell Lake sees significantly fewer hikers. The longer distance (for those without boat tickets) naturally filters the crowd, and the Many Glacier area on the east side draws fewer day-trippers than the west entrance corridor. The Many Glacier trailhead parking still fills early (often by 7 AM in peak season), but once on trail the hikers spread out. After the boat dropoff, the path to Grinnell Lake is relatively quiet even in summer.

2026 timed entry update: Glacier National Park has eliminated its timed entry permit system for 2026. You no longer need a vehicle reservation to drive Going-to-the-Sun Road. However, parking remains very limited at both trailheads — early arrival is still essential in July–August.

Grinnell Lake wins decisively for wildlife. The Many Glacier valley is one of the best places in Glacier — and arguably in North America — to see grizzly bears from a safe distance across open terrain. Per Glacier Guides, it's common to see grizzlies, moose, bighorn sheep, and mountain goats on this trail during peak season. Mountain goats frequently appear on the rocky ledges directly above the lake.

Avalanche Lake's dense forest canopy limits sight lines. Large mammals are present but harder to spot. You may see songbirds, Clark's nutcrackers, and the occasional black bear, but the west-side forest doesn't offer the same wildlife-watching opportunity. The creek is reliably excellent for spotting American dippers — small birds that walk underwater along Avalanche Creek.

If wildlife is a priority, Grinnell Lake and the Many Glacier area is the clear choice. Bring binoculars.

Choose Avalanche Lake if: this is your first time in Glacier, you want a shorter hike, you're based on the west side, or you love old-growth forest scenery. It's reliable, stunning, and the Trail of the Cedars boardwalk makes the approach accessible for almost everyone.

Choose Grinnell Lake if: you want fewer crowds, the most vivid lake color in Glacier, the best wildlife odds in the park, or you can take the boat shortcut to make it accessible for kids or older hikers. The Many Glacier area is consistently rated Glacier's most dramatic scenery — and Grinnell Lake is its centerpiece hike.

Do both if you can. They require a full day each and accessing them separately takes planning. If forced to choose just one for a single day in Glacier, most repeat visitors choose Grinnell; most first-timers choose Avalanche — and both are right.