The Trolley Museum, operated by a private nonprofit organization but located in the M-NCPPC’s Northwest Branch Recreational Park, opened to the public in 1969. Its mission includes preserving and interpreting the history of Washington’s electric street railways.
The collections include 17 streetcars from Washington and other cities, and the museum operates many on a mile-long demonstration railway. In addition, the museum features an O-scale model layout depicting a Washington streetscape from the 1930s, a film program, and traditional exhibits of street railway artifacts and photographs.