Line Extension
Southeast Rail Line Extension

The Southeast Rail Line opened in 2006 as a 19 mile extension of rail from I-25 & Broadway, with 15 miles along I-25 to Lincoln and an additional 4 miles along I-225 to Parker Road. This extension will add an additional 2.3 miles of rail and three new stations to bringing service south into Lone Tree.


New Rail in New Neighborhoods

The 2.3 mile extension will bring rail into Lone Tree, with three new stations and an additional 1,300 parking spaces at the end-of-line. Project design and construction began in 2016.


  • Lincoln Station


    • Address: 10203 Station Way, Lone Tree
    • Location: I-25 and Lincoln Avenue
    • Parking spaces: 1,734
    • Bike racks: 8
    • Bike lockers 16
    • Rail lines: E, F, R
  • Proposed future Sky Ridge Station location

    Sky Ridge

  • Proposed future Lone Tree City Center Station location

    Lone Tree City Center

  • Proposed future RidgeGate Parkway Station location

    RidgeGate Parkway

    • parking: 1,300 spots total



Final Environmental Evaluation, initiated in 2008, and 30% basic engineering completed
Project team began an Environmental Assessment (EA) to pursue federal funding
Work on advanced basic engineering and coordination of the project scope with stakeholders. New Starts application process proceeds through the grant development and engineering phases.
The FTA signed the Finding of No Significant Impact, which concludes the EA undertaken to fulfill the requirements of the National Environmental Policy Act, a requirement for eligibility for federal funding
Project becomes part of President Obama's 2016 budget. RTD Board of Directors approves a $140 million two-phased contract award to Balfour Beatty Infrastructure Inc. (BBII) to design and build the Southeast Rail Extension.
Budget and funding grant signed, with Notice to Proceed 2 (NTP2). Construction begins on May 16, 2016.