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Highline Trail

Intermediate/Difficult

Trail

19.9 mile 32.0 kilometer point to point
Intermediate/Difficult

Elevation

Ascent: 3,408' 1,039 m
Descent: -3,370' -1,027 m
High: 7,402' 2,256 m
Low: 5,849' 1,783 m

Grade

Avg Grade: 6% (4°)
Max Grade: 34% (19°)

Dogs

No Dogs
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A popular, flat, long traverse with stunning views, wildflowers, and frequent wildlife sightings.

Tom Hollo

Features Fall Colors · Views · Wildflowers · Wildlife

Family Friendly Kids may enjoy the views along this trail, but probably may not be able to handle the entire southern portion if too young, and should be held close on the cliffs section.

Always carry bear spray and know how to use it. Although the southern portion of this trail is flat, it is long and ends in a dry, hot burn area - carry plenty of water and do not attempt the entire southern trail unless you are reasonably fit. Practice "Leave No Trace" principles. The northern section of this trail has areas that carry snow that is sometimes impassable late into the season.

Description

This trail traverses the western side of the continental divide. The southern half starts at Logan Pass and heads northwest 7.6 miles to Granite Park Chalet. The northern half continues 11.9 miles to its intersection with Waterton Valley and Flattop Mountain Trails.

The southern half is commonly done as a day outing, starting at Logan Pass and ending at The Loop via Granite Park Trail. You can park a second car at either end for the return trip or use the shuttle service. The views of McDonald Creek valley are constant and breathtaking.

Starting from Logan Pass, follow the signs north across Going to the Sun Road to the trailhead. The trail goes through a meadow then hugs a series of cliffs on the slopes of the Garden Wall Divide. A cable bolted to the cliff wall is available during the summer, as the cliffs are sheer, but the trail is wide and this section is brief. The cliffs transition into steep, grassy slopes that you traverse for miles, occasionally crossing streams nice for resting and refilling water. After about 2.5 miles, you reach Big Bend, a rock field, then head uphill via switchbacks over a saddle on the east side of Haystack Butte. Fit hikers can take a detour to summit the butte. From the saddle, the trail continues its traverse with a gradual incline then shifts to a decline on its way to Granite Park Chalet.

About a mile before the chalet the Garden Wall Trail splits off to the right and climbs sharply for a mile to an unbeatable overlook of Salamander and Grinnell Glaciers. Worth the detour for fit hikers. Those doing the day loop continue to the chalet (food & bathrooms available) then take Granite Park Trail 4.2 miles down to The Loop. Note that trail passes through a west-facing burn area that gets very hot and dry at a day's end.

The northern section of the trail is less frequented but equally spectacular. Several areas harbor snow late into the season that is sometimes impassable. Doing this section in a day via looping back on the Flattop Mountain Trail is arduous but possible if very fit. It is easier to camp at Fifty Mountain Campground and hike out the next day.

From the chalet, the trail continues its traverse north toward Ahern Peak with great views of several drainages and mountain ridges. Just before the peak the trail turns sharp left at a junction with a short, steep spur up to Ahern Pass. The traverse continues around and up toward its terminus, with a final spur detour to an overlook of Sue Lake.

Visit hike734.com for more expert Glacier content and maps that help you decide which trail to hike.

Flora & Fauna

Wildflowers are diverse and abundant on the steep grassy slopes that make up much of this trail, if done in the late spring or summer. There are few trees.

Wildlife sightings are common. Keep an eye out for mountain goats in the meadows near Logan Pass or high in the cliffs/mountains to your right as you hike (but watch your step, as the fall would be treacherous in parts). Big Horned Sheep are also frequently seen up on the slopes. Lower down, keep an eye out for ground squirrels and marmots. Deer are common in the burn area heading down from the chalet to complete the single day loop.

Please do not feed wildlife

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Check-Ins

Aug 4, 2019
E Zimm
Jul 30, 2019
Walter van Schagen
Jul 27, 2019
Collin M
Jul 10, 2019
Matt Goolsby
Only went as far as Haystack Butte 10.7mi — 7h 55m
Jul 9, 2019
Chad Butler
Sep 18, 2018
Chris Poppy
Aug 31, 2018
Rochelle Hartigan
I turned around after 1 mile. The steep slope and rocky terrain we’re not worth the risk for the great views. I would not attempt this one again. 2mi
Aug 28, 2018
Tilman Giese

Trail Ratings

  4.4 from 10 votes

#6

in St. Mary

#4847

Overall
  4.4 from 10 votes
5 Star
80%
4 Star
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3 Star
10%
2 Star
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1 Star
10%
Trail Rankings

#6

in St. Mary

#128

in Montana

#4,847

Overall
35 Views Last Month
3,724 Since Sep 3, 2015
Intermediate/Difficult

0%
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25%
63%
13%
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Photos

This is a trip that involves the whole of the Northern Highline from Granite Park Chalet to Goat Haunt and includes the spur trail to the Ahern Pass Overlook.
Apr 5, 2016 near Swiftcu…, MT
Trip video of the Highline Trail from Logan Pass to the Loop.
Jun 9, 2016 near Swiftcu…, MT
Last sight of Lake McDonald on the way down the Highline Trail
Sep 18, 2019 near Red Roc…, MT
Cotton Candy factory seen from the Highline Trail
Sep 18, 2019 near Red Roc…, MT
Mount Clements from the Highline Trail.
Feb 1, 2016 near Red Roc…, MT
Looking at Granite Park Chalet with Logan Pass in the background.
Jun 5, 2016 near Swiftcu…, MT

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