The Wonderland Trail is an approximately 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 of elevation gain. The trail was built in 1915. The shelters are part of the notable rustic architectural theme that is particularly consistent at Mount Rainier in both frontcountry and backcountry, having all been built at the height of the NPS Rustic design trend. Since its founding in 1916, the NPS sought to design and build visitor facilities without visually interrupting the natural or historic surroundings. The shelters are part of the Mount Rainier National Historic Landmark District, which encompasses the entire park and which recognizes the park's inventory of Park Service-designed rustic architecture. Built by Civilian Conservation Corps The Summerland Trail Shelter, the Indian Bar Trail Shelter, and North Mowich Trail Shelter are the three CCC shelters remaining on the trail. Both were designed by the National Park Service Branch of Plans and Design, under the supervision of Edwin A. Nickel. Summerland Trail Shelter The Summerland Trail Shelter in Mount Rainier National Park is a rustic shelter on the Wonderland Trail, built by the Civilian Conservation Corps in 1934. The shelter features stone walls and a log roof structure, in a saltbox shape. It Measures about by . According to the supervising landscape architect, "The workmen were inexperienced in stone work and the shelter was not too good in appearance, but it was in harmony with its location." The shelter was listed on the National Register of Historic Places on March 13, 1991. North Mowich Trail Shelter The North Mowich Trail Shelter is one of a series of shelters designed to provide simple shelter to hikers on the Wonderland Trail in Mount Rainier National Park. The North Mowich shelter was built in 1934 by Civilian Conservation Corps workers. The log structure, open to the front, measures by . The shelter was listed on the National Register of Historic Places on March 13, 1991. Indian Bar Trail Shelter The Indian Bar Trail Shelter in Mount Rainier National Park is a rustic shelter on the Wonderland Trail, built by the Civilian Conservation Corps in 1940. The shelter features stone walls and a log roof structure, to a design by the National Park Service Branch of Plans and Design, under the supervision of Edwin A. Nickel. Measuring about by ,