Glacier’s most popular trail is the boardwalk from Logan Pass [1] to Hidden Lake Overlook, a three-mile round-trip hike through delicate alpine meadows, home to marmots, ptarmigan, and mountain goats. The weather can be blustery up here, even in midsummer, and the 500-foot climb to more than 7,000 feet above sea level can be surprisingly fatiguing.
For a fairly level trail that goes on for miles, the Highline Trail can’t be beat. It’s the main route to Granite Park Chalet [2] (7.6 miles), and it can be frustratingly crowded, but the above-timberline views, bear-grass meadows, and chattering marmots are absorbing enough to eclipse the other hikers. (Do note that there are some high ledges to traverse here; people hiking with young children and those with a fear of heights might want to give this trail a pass.)
Links:
[1] http://www.moon.com/destinations/montana/glacier-national-park/logan-pass-st-mary/sights/logan-pass
[2] http://www.moon.com/destinations/montana/glacier-national-park/lake-mcdonald-valley/accommodations/50-100