B Line to WestminsterArriving July 25

The B Line (referred to as the Northwest Rail during construction) will open for service on July 25, 2016, providing direct service from Union Station to Westminster. The B Line is the first six miles of the proposed 41-mile commuter rail line that will eventually go to Broomfield, Louisville, Boulder and Longmont.


New Rail in New Neighborhoods

The B Line brings RTD commuter rail train service through the heart of original Westminster. In addition to housing and commercial space, the city’s plan includes a new park south of the station along Little Dry Creek.


Travel on the B Line will be a local fare



1 -2 zones



3 zones



to / from DIA

Tickets can be purchased on the platform at a ticket vending machine, inside DIA, or at any RTD sales outlet.


  • Union Station

    Union Station

  • Westminster Station Rendering


    • Parking:350 total
  • Proposed future Church Ranch Station location

    Church Ranch

    • (future construction)
  • Proposed future Flatiron Station location


    • (future construction)
  • Proposed future Louisville Station location


    • (future construction)
  • Proposed future Boulder Junction Station location

    Boulder Junction

    • (future construction)
  • Proposed future Gunbarrel Station location


    • (future construction)
  • Proposed future Downtown Longmont Station location

    Downtown Longmont

    • (future construction)


The first segment of the B Line, from Union Station to Westminster (at approximately 71st and Lowell), is being funded and built through a public-private partnership called Eagle P3. The Eagle P3 project is the funding and construction agreement that is responsible for the completion of the A Line, the B line and the G Line. This program is the first of its kind in the nation and will serve as a model for future transit expansion projects.

In addition, RTD committed $17 million to the end-of-line station in downtown Longmont. Construction on this station will begin in 2015 and is scheduled to be completed in 2016.

The remaining segment of the project, from south Westminster to Longmont, will require additional funding to be completed.


RTD FasTracks Environmental Evaluation was completed, identifying the benefits and effects of implementing transit on BNSF Railway right-of-way
Construction of the first 6.2-mile electrified segment between Union Station and Westminster began
RTD FasTracks and its contractor completed the 15-month-long Northwest Area Mobility Study to determine the best mobility options for northwest communities including, the feasibility of building the Northwest Rail in phases and providing arterial bus rapid transit.
RTD FasTracks earmarked $17 million to build the first phase of the end-of-line station in Longmont under a construction-ready plan; RTD will use the station for bus transfers then upgrade to a rail/bus facility after it completes the Northwest Rail. Construction of the station will begin in 2015 and end in 2016.
RTD FasTracks will begin construction on the line between Westminster and Longmont when funding becomes available