Wonderland Trail, Hiking trail in Mount Rainier National Park, United States

The Wonderland Trail is a hiking path in Pierce County, United States, that forms a complete loop of 93 miles around Mount Rainier. The path crosses through conifer forests, climbs through wildflower meadows, and passes over rocky glacial sections at elevations between 3,000 and 6,750 feet (910 and 2,060 meters).

Park authorities marked this circular route in 1915 to give visitors access to all sides of the mountain. It received official recognition as a nationally important recreation area in 1981.

The name comes from the trail's 93-mile loop around Mount Rainier, which passes through the park's major life zones, from lowland forest to subalpine wildflower meadows. Hikers see different faces of the mountain carved by 25 named glaciers. Three rustic backcountry shelters built by the Civilian Conservation Corps between 1934 and 1940 stand at Summerland, Indian Bar and North Mowich.

A backcountry permit is required, and reservations for the eighteen trailside camps can be made through Recreation.gov after an early-year lottery; 30% of slots are held for walk-up allocation at the park's wilderness centers. The camps lie 3 to 7 miles (5 to 11 km) apart and each has cleared tent sites, a pit or composting toilet, a bear pole and a water source. Allow 10 to 14 days for the full loop; snow often covers the trail through June and early July.

The highest spot sits at Panhandle Gap at 6,750 feet (2,060 meters), where snowfields often remain visible into late summer. Two suspension bridges span wide meltwater rivers and sway gently under the weight of hikers.