Many Glacier: Grinnell Glacier and Iceberg Lake

The full round trip is 10.6 miles with about 1,600 feet of climbing, and it is strenuous. Along the way you pass turquoise lakes and waterfalls before reaching the ice tucked high against the cliffs. Hikers here have spotted moose, mountain goats and bears.

You can cut the distance by riding the boat shuttle across Swiftcurrent Lake. Riding two boats also brings you to the short, easy trail to Grinnell Lake, with a suspension bridge and a shallow lake ringed by waterfalls and cliffs. If you would rather not hike at all, the back deck of the Many Glacier Hotel looks out on Salamander Glacier.

Iceberg Lake starts at the Swiftcurrent Motor Inn and runs 9.6 miles out and back, climbing about 1,200 feet over five to seven hours. The lake is aquamarine from glacial silt and sits beneath steep, glacier-carved cliffs. On the way you pass Ptarmigan Falls and the Ptarmigan Wall, with wildflowers along the trail and a good chance of seeing mountain goats.

Ptarmigan Tunnel shares the same trail, splitting off to the right about halfway. It climbs harder, for 10.6 miles round trip and 2,300 feet of gain, and ends at a passage blasted through the rock in the 1930s, with wide views from the far side. It draws fewer hikers than Iceberg Lake or Cracker Lake.

For something shorter, Apikuni Falls is a two-mile round trip from the Apikuni Parking Area near the Many Glacier Hotel. It climbs about 700 feet and takes around an hour. Wherever you walk in this valley, you are in grizzly country, so hike in groups, make noise and carry bear spray.