Thunder Knob Trail is a 3.64-mile out-and-back foot trail in North Cascades National Park, Washington. It climbs 635 ft to a high point of 1,870 ft. Difficulty: moderate, from the NPS hiking-rating formula.
Open Thunder Knob Trail on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for North Cascades. North Cascades has permits or reservations for some areas: see the North Cascades page for what's needed.