Get ready for one of the most rewarding challenges in Glacier National Park. The hike to Grinnell Glacier is a strenuous but absolutely stunning 10.6-mile (17 km) round-trip journey that typically takes the better part of a day, 6 to 8 hours. You'll be treated to breathtaking alpine views, pass by vibrant wildflowers and emerald lakes, and get an up-close look at the glacier itself. The trailhead parking lot fills up exceptionally early, so plan on an alpine start to secure a spot for this unforgettable adventure. This trail is also teeming with wildlife. People have seen everything from moose, wolves, grizzlies, mountain goats, and marmots, so make sure you bring your camera!