Esker:  A long, narrow, steep-sided ridge of coarse sand and gravel deposited by a stream flowing in or under a melting sheet of glacial ice.

The Highline Trail starting from Logan's Pass is the premier hiking trail in Glacier National Park and is regularly mentioned as a top 10 hike in the continental United States. It is ordinarily hiked as a loop back to 'Going to the Sun Road' or as part of a multi-day hike. The terminus of the hike is at the southern end of Waterton Lake. 

The trail cuts through the epicenter of GNP and runs relatively flat through spectacular terrain.