Mapped here is the round trip in the valley itself, starting at Lower Fryatt campground. To get there, you’ll have to hike or bike 11.6 kilometers on the Fryatt Valley Fire Road. Lower Fryatt is the first option for camping, and Brussels campground is the second. Brussels is the best campground, so stay there if you can. It makes a great base camp for hiking higher in the valley as a day trip. Alternatively, you can spend a night at the 3rd campground, Headwall, or book a night at the ACC hut, which is even higher in the valley. Regardless of where you camp, you should definitely hike at least as far as Headwall camp (9.5 km from Lower Fryatt Camp) in order to see the Headwall Waterfall.

The entire trail is somewhat strenuous, with steep sections, water crossings, and mud, but the toughest section is the final kilometer, which climbs the headwall through talus and boulders. Keep a close eye on the yellow markings to avoid losing the trail. When you make it up the headwall, you’ll find the ACC hut and astounding views over the entire valley. It’s possible to hike even farther, beyond the extent mapped here, to a milky lake beneath the glaciers.

Source: https://www.pc.gc.ca/en/pn-np/ab/jasper/activ/passez-stay/arrierepays-backcountry