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Monarch Boulevard to extend through to Lagae Road

Information provided by the City of Castle Pines; photo by Kathy Fallert

Beginning in February, the City of Castle Pines will begin extending the end of Monarch Boulevard east through the [currently under construction] Lagae Ranch development to a new roundabout at the intersection of Monarch and re-aligned Lagae Road.  The new roadway is designed to improve access and connectivity of the city’s street network and mitigate traffic impacts of new development.   Extending Monarch creates a new connection with Lagae Road and eventually Happy Canyon to provide easy access to I-25, ultimately easing congestion on Castle Pines Parkway.

“While the extension of Monarch won’t have a direct impact on school traffic, other improvements – the additional lane on Mira Vista, the roundabout at Mira Vista and Lagae, and the future improvement to the intersection of Lagae and Castle Pines Parkway – are designed to improve access and traffic flow for both the school and the greater community, said City spokesperson Kim Newcomer.

For additional information regarding the Lagae Ranch development or other projects within the city, visit



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