The Loop Trailhead, Glacier NP: 3.2 miles, 700 ft gain

The Loop Trailhead at Glacier National Park opens onto a green valley with jagged, snow-capped peaks in the distance.

The Loop Trailhead offers a steady, non-technical climb through forest with rewarding views. Parking is tight, and shuttle may be required during peak season, so plan ahead.

Quick facts

Distance Miles: 4.2
Route Type: Point-to-Point (descent or out-and-back; can be combined with the Highline Trail)
Difficulty Level: Strenuous to challenging (depends on Highline linkage)
Elevation Gain Feet: 2600

Trail profile

Distance Miles: 4.2
Route Type: Point-to-Point (descent or out-and-back; can be combined with the Highline Trail)
Difficulty Level: Strenuous to challenging (depends on Highline linkage)
Elevation Gain Feet: 2600
Estimated Time: 3-4 hours for Loop; 6-8 hours for Highline Trail to The Loop descent
Trail Surface: Packed dirt with sections of loose rock and scree
Trail Features: Grinnell Glacier Overlook (via Highline Trail)
Exposed ridgelines with distant glacier views
Crowded during peak season
Trail Highlights: Panoramic views of mountains, valleys, and glaciers; Grinnell Glacier Overlook

Trailhead & access

Trailhead Location: Hairpin turn on Going-to-the-Sun Road, west side of Glacier NP
Parking Lot Size: Limited capacity
Parking Fill Time: Full by 7:00 AM during peak season
Shuttle Required: 1
Shuttle Details: Glacier National Park shuttle is essential for completing The Loop as a point-to-point; plan to shuttle back to Logan Pass or start with Loop and return via shuttle; check schedule.

Permits & conditions

Permits Required: Yes
Permit Details: No permits required for day hikes; vehicle reservations may apply during peak season.
Fees: Standard park entrance fees; vehicle reservation fees may apply.
Trail Status: Open
Seasonal Closures: Snow can linger into July on higher elevations; mud season in spring/early summer.

Facilities & rules

Restrooms At Trailhead: 1
Water Sources: Water sources are not consistently reliable; carry at least 3 liters per person
Accessibility: Exposed, limited shade; not wheelchair accessible; several steep sections

Safety & strategy

Hazards: Bear country
Steep drop-offs
Rapid weather changes
Loose scree on descents
Wind exposure
Hazard Details: Make noise to deter surprised bears; carry bear spray; descend carefully on loose rock; weather can flip quickly; sun exposure high due to limited shade
Cell Service: Unreliable; plan for little to no signal along most of the route
Crowd Level: Very popular; can be crowded during peak season
Peak Crowd Times: Midday during peak season; early mornings quieter
Parking Strategy: The trailhead sits along Going-to-the-Sun Road at the west end of the Loop. Parking is a small pullout with very limited spaces and tends to fill by around 7:00 AM in peak season, so be prepared to circle or shuttle. During times when the road is fully open, a shuttle is required to access the trail. Arrive early or consider alternative access options if parking is full.
Effort Verdict: Moderate workout: 3.2 miles round trip with about 700 feet of elevation gain. It isn’t technical, but the steady climb will test endurance. Plan 2–3 hours for fit hikers and 3–4 hours for a more relaxed pace.
Ideal Hiker Profile: A hiker with solid aerobic fitness who can sustain a steady pace for 2–3 hours (fit hikers) or 3–4 hours (casual hikers). Comfortable with a 700-foot gain over 3.2 miles and prepared for bear country with bear spray. Suitable for solo travelers or small groups, provided you bring adequate water, layers, and a map.
Best Season: July through September
Best Time To Visit: Best in July–September after snowmelt; start early to beat crowds and afternoon storms.
Tips Advice: Tighten your boots.
Carry 3L water minimum.
Trekking poles strongly recommended for the steep descent.
Bear awareness: make noise and carry bear spray.

More details

Trail Markers: Well-marked with signage along Going-to-the-Sun Road and at trailheads
Dogs Allowed: Not allowed
Biking Allowed: No
Shade Level: Limited shade; exposed ridgelines; wind
Emergency Contacts: 911 for emergencies; Glacier National Park rangers
Map Recommended: 1
Best For: ✅ HIKE IF: You crave a long, exposed alpine traverse and can handle sun exposure and elevation.
❌ SKIP IF: You have vertigo or plan a hike with young children.
Snow Dates: Snow can linger into July on higher elevations
Mud Season: Spring and early summer muddy conditions
Bug Season: Mosquitoes can be present in early to mid-summer
Insider Tips: Start before sunrise to secure parking and cooler temps.
Hike the Highline Trail Logan Pass to The Loop Trailhead, then use the shuttle to return.
Trekking poles strongly recommended for the descent; plan for afternoon thunderstorms.
Family Friendly Notes: Not recommended for young children due to steepness, exposure, and length; especially when linked with Highline Trail
Nearby Facilities: Restrooms at The Loop trailhead; parking is limited; Glacier National Park shuttle stops; water not guaranteed
Photo Ops: Photo opportunities include forested sections in the first half with filtered light, then rocky portions as views open up toward the surrounding peaks and the road corridor. Use a mid-range lens to capture distant ridges and a tripod for low-angle light in shaded areas or at dawn/dusk.
Review Summary: Hikers report a demanding ascent and a long, exposed descent; the route delivers expansive glacier-and-mountain views and a reliable shuttle system, but crowds can be heavy in peak season.