Grinnell Glacier Trailhead: 10.6-mile out-and-back in Glacier NP

Grinnell Glacier Trailhead offers a sweeping view of turquoise Grinnell Lake and rugged peaks in Glacier National Park.

Grinnell Glacier Trailhead offers a challenging 10.6-mile out-and-back to Grinnell Glacier. The route features rocky ledges, scree, and exposure in the upper sections, with bear country a consideration. Start early or use the shuttle options to shorten the day.

Quick facts

Distance Miles: 10.6
Route Type: Out-and-back
Difficulty: easy
Difficulty Level: Strenuous

Trail profile

Distance Miles: 10.6
Route Type: Out-and-back
Difficulty: easy
Difficulty Level: Strenuous
Elevation Gain Feet: 2047
Estimated Time: 5-7 hours
Trail Surface: Primarily packed dirt and loose scree, with some boulder fields and rock terraces
Trail Features: Grinnell Glacier view
Grinnell Falls
Grinnell Lake
Upper Grinnell Lake
alpine meadows
wildflowers
Trail Highlights: Close-up views of Grinnell Glacier, alpine meadows, glacial lakes, and distant peaks. High reward for the effort.

Trailhead & access

Trailhead Location: Grinnell Glacier Trailhead, Many Glacier Road, Glacier National Park, MT. Coordinates: 48.79721, -113.66843
Parking Lot Size: Small, limited parking lot
Parking Fill Time: Typically full before 7-8 AM, especially on weekends
Shuttle Required: 1
Shuttle Details: Many Glacier Hiker Shuttle requires advance reservations via Recreation.gov. Boat shuttles across Swiftcurrent Lake and Lake Josephine shorten the hike by about 3.4 miles; reservations for boat shuttles are highly recommended and often sell out in advance.

Permits & conditions

Permits Required: Yes
Permit Details: Park entrance pass required. In the Many Glacier area (July 1–September 21), a reservation or shuttle ticket may be required; park entrance passes available at Recreation.gov or in person at the park entrance.
Fees: Glacier National Park entrance fee is $35 per vehicle for seven days. Boat shuttle fees apply.
Trail Status: Open
Seasonal Closures: Snow can linger on upper sections; check conditions. Typically snow-free mid-June to early September; closures possible outside that window due to weather.

Facilities & rules

Restrooms At Trailhead: 1
Water Sources: Potable water pump at trailhead picnic area; creeks may be present, filtering recommended

Safety & strategy

Hazards: Bear country (grizzly and black bears)
Afternoon thunderstorms
Sun and wind exposure
Lingering snowfields early in the season
Slippery wet rocks near waterfalls
Steep drop-offs on final push
Hazard Details: Carry bear spray and travel in groups. Thunderstorms can roll in quickly; stay alert for weather shifts. Expect sun exposure on exposed sections and slippery rocks near the glacier approach; the final ascent includes rock stairs and boulders with drop-offs.
Cell Service: Limited or no service in remote mountain areas
Crowd Level: Very popular and can be crowded, especially during peak season and with shuttle boat users
Peak Crowd Times: Peak mid-summer; mornings are busiest; weekends see larger crowds
Parking Strategy: Parking strategy: The main Grinnell Glacier Trailhead lot is small and typically fills by 7:00 AM. Overflow parking is available along Many Glacier Road. With limited parking, the Many Glacier Shuttle is recommended. For a shorter route, use the Glacier Park Boat Company shuttle across Swiftcurrent Lake to Lake Josephine to shave miles. Restrooms: vault toilets at the trailhead and about 0.5 miles from Grinnell Lake.
Effort Verdict: Effort verdict: Strenuous; 10.6 miles round-trip with 1,600–2,470 ft of gain. Full hike typically 5–7 hours; a shortened 7.2-mile option is available via the Glacier Park Boat Company shuttle across Swiftcurrent Lake and Lake Josephine.
Ideal Hiker Profile: Ideal hiker: An experienced day hiker comfortable with long distances, elevation gain, and exposed ledges. Prepare for 10+ miles and up to 2,470 ft of gain, with rugged footing on loose rock and bear country nearby. Carry 2–3 liters of water, wear sturdy boots, and consider using shuttle services to shorten the day.
Best Season: Mid-June through September
Best Time To Visit: Start by 7 AM to beat crowds and heat. Reserve shuttle tickets well in advance.
Tips Advice: Carry 2 liters of water minimum
Bear spray and knowledge of use
Trekking poles for rocky sections
Layered clothing for changing mountain weather
Start cold and pace yourself

More details

Shade Level: Limited shade, especially in the latter half of the hike
Map Recommended: 1
Best For: Experienced hikers
Photographers
Wildlife watchers
Alpine scenery enthusiasts
Snow Dates: Typically snow-free from mid-June to early September; snow can linger on upper sections
Mud Season: Mud and slick footing expected during snowmelt in early season
Bug Season: Mosquitoes and other biting insects can be present during summer months
Insider Tips: Use the boat shuttle to dramatically cut mileage
Start by 7 AM to secure parking and beat heat
Consider taking the boat one-way to reserve energy for the climb or for the descent
Bear spray and windproof layers are a must
Trekking poles help on rocky sections
Recent Updates: Check recreation.gov for 2026 timed-entry vehicle reservation dates for Going-to-the-Sun Road and Many Glacier areas. Trail conditions vary; check NPS Glacier status page before your trip.
Family Friendly Notes: Strenuous and long; generally not recommended for children under 10 due to distance, elevation, and hazards. Older, experienced children (10+) may manage with proper prep.
Nearby Facilities: Vault toilets at trailhead and a quarter-mile from the glacier basin
Photo Ops: Photo ops: Capture Grinnell Glacier and surrounding peaks from exposed ledges; sunrise over Swiftcurrent Lake and Lake Josephine from the boat shuttle; close-ups of scree and boulder fields on the approach; reflective lake scenes along Swiftcurrent Lake.
Review Summary: Hikers report a demanding climb with a lasting payoff: glacier access and alpine lakes. Crowds can be heavy during peak season and with boat shuttles; arriving early and using the shuttle improves the experience. Prepare for a long day and carry adequate water and sun protection.

Location

Photos

Grinnell Glacier Trailhead at the turquoise Grinnell Lake in Glacier National Park.

Grinnell Glacier Trailhead at Glacier National Park rises above talus and waterfalls with jagged peaks setting a dramatic alpine scene.

Grinnell Glacier Trailhead sign at Glacier National Park marks distances to Josephine Lake, Grinnell Lake, and Grinnell Glacier in lush forest.

Grinnell Glacier Trailhead hikers navigate rocky ledges beside a waterfall along Glacier National Park’s Grinnell area.

Frequently asked questions

Are bears common on this trail?

Yes. Travel in groups, make noise, and carry bear spray; store food properly and stay alert.

Is there a shuttle and how do I book it?

Yes. The Many Glacier Hiker Shuttle requires advance reservations via Recreation.gov. Boat shuttles across Swiftcurrent Lake and Lake Josephine can shorten the hike; reserve early as they sell out.

Is this trail suitable for beginners?

Not ideal for beginners. It’s long and strenuous with exposed sections and potential hazards. Proper conditioning and gear are essential.

Do I need a permit or special ticket?

A park entrance pass is required; in the Many Glacier area, summer reservations or shuttle tickets may be required.

What gear is non-negotiable?

Sturdy boots with grip, trekking poles, layers for mountain weather, sun protection, and bear spray.

When is the glacier most accessible by hike?

Mid-June to early September is the typical window when snow is off the upper sections; conditions can shift fast with weather.

What’s the best energy plan for this hike?

Start early, hydrate aggressively, and consider using the boat shuttle to preserve energy for the ascent and descent.