The Wonderland Trail is an approximately 93 mile (150 km) hiking trail that circumnavigates Mount Rainier in Mount Rainier National Park, Washington, United States. The trail goes over many ridges of Mount Rainier for a cumulative 22,000 feet (6,700 m) of elevation gain. The trail was built in 1915. In 1981, it was designated a National Recreation Trail. An estimated 200 to 250 people a year complete the entire trail with several thousand others doing shorter sections of it. The average time taken to complete the entire trip is 10 to 14 days.