Four Corners

Join the conversation

  1. Community members will have the opportunity to view the preliminary design and provide comments at an online open house from 6 – 7 p.m. on Tuesday, July 27. Feedback will be used to optimize improvements and minimize impacts as the design is finalized. Final design is expected to be complete early next year.

    Participate live to view presentation materials
    Join by phone at 1 720 928 9299
    Meeting ID: 949 8950 1486
    Passcode: 204679

    Can't make the meeting? Provide feedback online

General map showing the location of the four corners project areaFour Corners Intersection Improvements

Castle Rock is one of the fastest-growing towns in Colorado. This growth brings many positive changes to our community but also has led to some traffic safety and operational issues as this growth outpaces funding for transportation improvements. In 2017, the Castle Rock Transportation Master Plan identified the need for improvements at the Four Corners intersection, located approximately two miles east of Downtown. This intersection of Founders Parkway, Fifth Street, State Highway 86, and Ridge Road currently serves more than 30,000 vehicles per day – a number that is expected to increase to more than 48,000 vehicles per day by 2040. This intersection also has a high crash rate and lacks connections/safe accommodations for bicyclists and pedestrians.   

To address these safety and operational issues, the Town plans to improve the intersection with a solution that will last well into the future. The Town successfully secured regional funds through the Denver Regional Council of Governments to complete design and construction of these improvements. Design efforts began in late 2020, and the project is expected to begin construction in 2022.

Join the conversation 

Join the project mailing list to receive notice of input opportunities and to stay informed about project progress.

March 9, 2021, online open houseView the presentation slides (PDF) to learn more about the improvement alternatives that were considered and how they were evaluated, or read public comments from the online open house (PDF).  

July 27, 2021, online open house – Give feedback regarding the preliminary (30%) design that will be used to optimize improvements and minimize impacts as the design is finalized. 

Join the meeting online to view the presentation materials:  (case sensitive) Or, if you are unable to connect online, join via phone:

DIAL IN NUMBER: 1 720 928 9299
MEETING ID: 949 8950 1486
PASSCODE: 204679

Can't make the meeting? Provide feedback online

Project area


Project schedule

A graphical timeline of the four corners project. Construction anticipated Summer of 2022.