2025 Monarch Boulevard & Castle Pines Parkway Road Construction

Project Overview

As a part of the 2025 Road Solutions projects, improvement efforts began on June 2, 2025, along Monarch Boulevard and Castle Pines Parkway. These projects represent a significant investment in Castle Pines’ infrastructure, enhancing safety, increasing mobility, and upgrading critical utilities.

Monarch Boulevard

This project includes rehabilitation work from Buffalo Trail to Winter Berry Place and complete reconstruction from Berganot Trail to Buffalo Trail.

Schedule:

  • Phase One Reconstruction start: June 2, 2025
  • Anticipated Monarch Boulevard project completion: September 2025
  • Beginning June 25, the southern half of the Hidden Point Boulevard and Monarch Boulevard intersection will be closed for construction activities. Two-way traffic will be maintained via the northern half of the intersection. The current construction detour will remain in place.

Project improvements include:

  • 2,400 feet of roadway improvements from Berganot Trail to Winter Berry Place
  • Safety enhancements
  • Stormwater infrastructure improvements
  • Six-foot bike lanes
  • 1,700 feet of new water line by the Castle Pines North Metropolitan District from Berganot Trail to Buffalo Trail
  • Temporary traffic light installation at Monarch Boulevard and Buffalo Trail intersection
  • During the June 24, 2025, the City Council approved the addition of a roundabout at the intersection of Buffalo Trail and Monarch Boulevard. This addition will be completed as part of the ongoing 2025 Monarch Boulevard reconstruction project.

Castle Pines Parkway Reconstruction

This project includes eastbound Castle Pines Parkway reconstruction from Forest Park Drive to Monarch Boulevard.

Schedule:

  • Project start: June 2, 2025
  • Anticipated Roadway Opening: August 9, 2025

Castle Pines Parkway is scheduled to completely reopen before the Douglas County School District begins the Fall 2025 semester. The remaining landscape installation and sidewalk construction are scheduled to be completed by the end of August.

Project improvements include:

  • 3,000 feet of full roadway reconstruction from Forest Park Drive to Monarch Boulevard
  • Safety enhancements
  • Stormwater infrastructure improvements
  • Six-foot sidewalks

What to Expect

Beginning June 2, 2025:

  • Monarch Boulevard from Berganot Drive to Hidden Point Boulevard will be closed to through traffic for full roadway reconstruction. This closure is necessary to ensure the safety of construction crews and drivers. A detour route via Buffalo Trail will be clearly marked for through traffic.
  • Eastbound lanes on Castle Pines Parkway from Forest Park Drive to Monarch Boulevard will be closed for reconstruction. Two-way traffic will be maintained throughout the duration of the project by shifting traffic to the westbound lanes of Castle Pines Parkway.
  • See the Project Detour Map for a visual representation of the project work area and traffic detours.

Additional Project Information 

  • To minimize impacts to school-related traffic during the Fall 2025 semester, the majority of construction work will take place during the summer.
  • A new water line will be installed on Monarch Boulevard from Berganot Trail to Buffalo Trail. By combining this work with the road construction, we can upgrade the water infrastructure, reduce costs, and minimize the length of disruptions compared to doing the projects separately.
  • Access to homes within the construction area will be maintained at all times. This access will be limited to local traffic and emergency vehicles only.

Current Traffic Closures and Detours

Beginning June 2, 2025:

Monarch Boulevard Detour Information:

  • Monarch Boulevard will be closed to through traffic between Berganot Trail and Buffalo Trail for full roadway reconstruction, including asphalt removal and replacement. Through traffic on Monarch Boulevard will continue to use the Buffalo Trail detour.
  • Access to homes within the construction area will be maintained at all times from Monarch Boulevard, north of Hidden Point Boulevard. If local traffic is traveling from the south, they will use the detour via Buffalo Trail and then access Hidden Point Boulevard via Monarch Boulevard from the north. This access will be limited to local traffic and emergency vehicles only.

Castle Pines Parkway Closure Information:

  • From July 22-23, temporary traffic delays will occur at Forest Park Drive so crews can begin paving operations. Flaggers will be in place to help traffic enter and exit Forest Park. Short delays should be expected. Work will begin at 6 a.m. each day to limit traffic delays.
  • The eastbound lanes on Castle Pines Parkway, from Forest Park Drive to Monarch Boulevard, will be closed for full roadway reconstruction.
  • Two-way traffic will be maintained using the westbound lanes.-
  • Oxford Drive will not be accessible from Castle Pines Parkway. Access will be maintained to local traffic and emergency services from Monarch Boulevard south of the Castle Pines Parkway intersection.

Detour Routes:

For information about the various detour routes, view each detour map below. Click on the map image to enlarge. Text describing each map image is also provided below.

Map showing closure and detours for motorists to use as Monarch Boulevard is under construction.
Monarch Boulevard Closure and Detour Map
Map showing that Oxford Drive will not be accessible from Castle Pines Parkway.
Castle Pines Parkway and Oxford Drive Closure Map
Map showing that there will be no left turn from Castle Pines Parkway westbound onto Forest Park Drive.
Castle Pines Parkway and Forest Park Drive No Left Turn Detour Map

 

 

 

 

 

 

 

 

 

Descriptions of Map Images:

Monarch Boulevard Closure and Detour Map: Map shows that Monarch will be closed to through traffic between Berganot Trail and Buffalo Trail for full roadway construction. Access to homes within the construction area will be maintained from Monarch Boulevard, north of Hidden Point Boulevard. If local traffic is traveling from the south, they will use the detour via Buffalo Trail and then access Hidden Point Boulevard via Monarch Boulevard from the north.

Castle Pines Parkway and Oxford Drive Closure Map: Map shows that Oxford Drive will not be accessible from Castle Pines Parkway. Access will be maintained to local traffic and emergency services from Monarch Boulevard south of the Castle Pines Parkway intersection.

Castle Pines Parkway and Forest Park Drive Map: Map shows that there is no left turn onto Forest Park Drive westbound on Castle Pines Parkway. Motorists should continue westbound on Castle Pines Parkway to the roundabout to access Forest Park Drive. There is also no left turn westbound onto Castle Pines Parkway from Forest Park Drive, so motorists wanting to head in that direction should turn right (eastbound) onto Castle Pines Parkway and turn left onto Bristolwood Drive to turnaround and then turn right (westbound) onto Castle Pines Parkway.

If you have questions about the projects, please email monarch@castlepinesco.gov or call 303-705-0200.

Want to learn more about our long-term Road Solutions?

City Council has created a Plan of Action for the Streets of Castle Pines. Visit our Road Solutions page and find out how the City plans to invest heavily in our infrastructure over the next several years.