This epic adventure is a true wilderness experience. The Lost River cuts through a portion of the huge Pasayten Wilderness, and for the majority of its course here, there is not even a trail that parallels it. Flowing through a beautiful and remote canyon of pink granite, the Lost River is a marvel that few get to enjoy. The hike in is approximately 5.8 miles on a well-maintained trail over a pass, then on a primitive trail along Drake Creek, a tributary of the Lost. The run itself starts small and is often choked with logs, but gets progressively larger and more exciting. A former lake, created from an obvious landslide on the left, appears at about 8 miles from the trailhead. Shortly thereafter is a series of large drops that should be portaged river left. The river gradually broadens as you head downstream, but the rapids and the scenery remain as great as ever. Allow a weekend for this adventure. There is backcountry camping near Drake Creek and good sites near the former lake, just be sure not to camp beneath a talus slope.