These glaciers formed as one ice mass, but in 1926 they broke apart and have been shrinking ever since. The best viewpoint is reached by the 5½-mile Grinnell Glacier Trail from Many Glacier. The trailhead for the trail is at the far northwestern end of Lake Josephine. You can get there by boat or hike via the trail behind the Many Glacier Hotel.
To learn more about the geology of the area, take a daily ranger-led hike to Grinnell Valley that departs each morning from the Many Glacier Picnic Area and takes about six hours. Ranger-led programs run from the third week in June through Labor Day.
Glacier National Park, Montana, USA