With 1.7 million active members, REI is the nation's largest consumer cooperative. REI's Denver Flagship, used as a retail store as well as a restaurant and assembly space, is housed in the historic 1901 Denver Tramway Powerhouse Building. The building is listed in the U.S. Department of the Interior's National Register of Historic Places.
In line with REI's adventurous history, the Denver Flagship houses a mountain bike trail, climbing pinnacle, and a cold chamber for testing and comparing recreational gear.
The reuse of a historic building enabled REI to save materials as well as significant energy involved in demolition and new construction. The building was designed to use 30% less energy than Colorado building energy codes mandate.