Castle Towers
Proceed cautiously on this 34.4-km out-and-back trail near Whistler, British Columbia. Generally considered a highly challenging route, it should only be attempted by experienced adventurers. This trail is great for camping and hiking, and it's unlikely you'll encounter many other people while exploring. The best times to visit this trail are June through September. You'll need to leave pups at home — dogs aren't allowed on this trail.