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blueBlack Highline Trail


19.9 mile 32.0 kilometer point to point


Ascent: 3,618' 1,103 m
Descent: -3,650' -1,113 m
High: 7,414' 2,260 m
Low: 5,830' 1,777 m


Avg Grade: 7% (4°)
Max Grade: 30% (16°)


No Dogs
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Trail shared by Tom Hollo

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.


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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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 6, 2018
Larry Anderson
Jul 7, 2018
Vikas Asthana
Jul 4, 2018
Faith Stout
only hiked to the chain hand rail
Jul 3, 2018
Brandon Chase
Aug 28, 2017
Rebecca Smith
Aug 22, 2017
Caitlin Verboon

Trail Ratings

  4.4 from 7 votes


in Belly River


  4.4 from 7 votes
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