As glaciers retreat, plants move in to occupy the recently exposed land in a process called succession. This entire trail is a classic example of Ice Age succession, since you’ll pass from mature forest to scrub trees to rocky moraines as you approach the glacier. There are picturesque views along the Herbert River, and while the hike is mostly flat and one of the area's easier walks, it’s long—about 5 hours round-trip. After four miles, the trail ends at a braided stream and gravel bar under Herbert Glacier. If the water is low you can stand on the sand bar and look up at the ice. It’s truly a dramatic sight.