West Boundary Trail is a 5.24-mile out-and-back foot trail in Mount Rainier National Park, Washington. It climbs 1,177 ft to a high point of 4,628 ft. Difficulty: strenuous, from the NPS hiking-rating formula.

Open West Boundary Trail on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Mount Rainier. Mount Rainier has permits or reservations for some areas: see the Mount Rainier page for what's needed.