This is my favorite hike in Glacier National Park. It's long and flower-filled. You will probably see mountain goats on the trail, as well as marmots. The views are unparalleled. If you're lucky, you'll be there during a summer that the bear grass is in bloom.
That's one of the best things ever done. The instructors are great and experienced, deal well with people who are scared. Visit the park and you will have the best memories from your trip!