Thornton Lakes Trail (southwest section) is a 0.54-mile out-and-back foot trail in North Cascades National Park, Washington. It climbs 25 ft to a high point of 2,733 ft. Difficulty: easy, from the NPS hiking-rating formula.
Open Thornton Lakes Trail (southwest section) 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.