Grinnell Glacier Trail

Overview

If you want the Many Glacier greatest hits in one push, this is it. Grinnell Glacier is a strenuous out-and-back to a high viewpoint above Upper Grinnell Lake, with constant views of turquoise water, cascading falls, and serrated peaks. From the standard trailhead, it’s about 10.6 miles total with roughly 1,600–2,080 feet of gain, and most parties take 5–6 hours depending on pace and photo breaks. It’s exposed for long stretches, so heat and sun are often as challenging as the grade.

You don’t step onto the glacier; the destination is a spectacular overlook of Grinnell Glacier beneath Mount Gould and the Garden Wall, with Salamander Glacier perched above and tiny Gem Glacier visible nearby.

Route snapshot

Start near Many Glacier Hotel between the hotel and Swiftcurrent Motor Inn. The path skirts Swiftcurrent Lake, then Lake Josephine on easy tread before the real climb begins. As you gain the bench above the lakes, classic views open down to Grinnell Lake and thundering Grinnell Falls. Expect some airy, narrow sections with steep drop-offs and occasional spray where small waterfalls cross the trail. About a quarter mile before the basin, there’s a rest area with pit toilets; the final bit climbs a rocky moraine to the viewpoint and milky-blue tarn.

Shorten it with boats

From Many Glacier Hotel, concession boats shuttle across Swiftcurrent Lake and Lake Josephine, trimming roughly 3.4–3.5 miles off the round trip. Seats book up well in advance in peak season, and many hikers mix it up—boat one way, hike the other.

Geology and wildlife

Look for the striking dark “band” on Mount Gould—a diorite sill intruded into lighter limestone, a textbook slice of the park’s deep-time story. Wildlife sightings are common: mountain goats and bighorn sheep frequent the slopes, and both grizzly and black bears use these valleys. Give all animals wide space and carry bear spray.

Logistics and crowd tips

Parking at the Grinnell Glacier Trailhead is limited, with overflow along Many Glacier Road. There are bathrooms and a potable water pump at the trailhead, plus pit toilets near the upper basin. In peak season, plan an early start to beat both the sun and the crowds; the viewpoint fills by late morning. In 2025, visitors with lodging, horseback riding, or boating reservations have access and dedicated parking at Many Glacier Hotel (July 1–Sept 21). Hikers using the shuttle service need a single shuttle ticket; boat reservations are highly sought after and often sell out months ahead.

Best time to hike

Typically July through September offers the most reliable, snow-free conditions. Early season (late June) can still hold snow and ice on the upper traverses. Hit the trail at dawn for cooler temps, easier parking, calmer winds, and golden light on the lakes and walls. On warm days, carry 2.5–3 liters of water per person.

Safety and conditions

This is bear country—make noise, travel in groups when possible, and keep bear spray accessible. Early season can bring lingering snow/ice on exposed sections; traction like microspikes and trekking poles help when it’s firm. Expect brief wet feet or a splash where falls cross the path. If heights make you uneasy, know there are short cliff-hugging sections. Pets are not allowed on park trails.

Easier alternative

Want the color without the climb? The Grinnell Lake hike offers gentler, mostly lakeside walking and many of the same views, with the option to use the boats to shorten it further.