N Line (RTD)

The N Line, also known as the North Metro Rail Line during construction, is a commuter rail line which is part of the commuter and light rail system owned by the Regional Transportation District (RTD) in the Denver metropolitan area in Colorado. The first 13 miles (21 km) from downtown Denver to 124th Avenue in Thornton opened as part of the FasTracks expansion plan on September 21, 2020. When fully built out the line will be 18.5 miles (29.8 km) long and pass through Denver, Commerce City, Northglenn, and Thornton. The N Line features Colorado's longest bridge at 9,533 feet (1.8 mi; 2.9 km) called the Skyway Bridge. While other RTD commuter lines are operated by Denver Transit Partners for RTD, this is the only line operated by RTD itself.