Douglas County seeks public input on final Grigs Road design phase
Castle Pines and Highlands Ranch drivers have until July 30 to weigh in on Grigs Road’s last mile, where a roundabout, drainage fixes and a trail link are still being shaped.
A 1-mile segment of Grigs Road between Castle Pines and Highlands Ranch is open for public comment through July 30 as Douglas County prepares the next phase of Grigs Road Phase 2.
Grigs Road Phase 2 is set to finish the remaining 1-mile segment of the corridor and create a more complete route linking Highlands Ranch, Daniels Park and Castle Pines. The work is meant to improve safety, strengthen regional connectivity, address drainage needs and support long-term roadway performance, using county property-tax revenue dedicated to road and bridge improvements.
The county’s current concept calls for a 24-foot-wide asphalt roadway, curb and gutter, drainage improvements, safety upgrades for curves and steep slopes near the trailhead, a roundabout at the future entrance to Wildcat Regional Park and a shared-use trail for pedestrians and bicyclists. Survey work and the geotechnical investigation are already complete, and Amy Strouthopoulos, the project manager, is overseeing the planning and design effort for Douglas County Engineering.
The design is still being refined. County staff and the design engineer are evaluating concept layouts, and once a roadway alignment is selected, the consultant will continue with roadway and drainage design. Douglas County has also posted a virtual open house for the project.
Construction is anticipated for 2027. A previous county decision approved a $492,659 design contract with RS&H for Phase 2, and staff later projected late-2026 bidding and roughly $3 million in construction costs. Douglas County Engineering is managing the project with the Highlands Ranch Metro District and the Highlands Ranch Community Association.
Wildcat Regional Park is a planned 202-acre regional park in the northeast portion of the Backcountry Wilderness Area. The land was transferred to Douglas County in 1996, and community feedback helped shift the park away from a higher-intensity concept toward a low-impact, trail-focused design. The current vision includes about 5 miles of bike-only trails and about 3 miles of surfaced trails.
Phase 2 follows work that extended asphalt pavement from Daniels Park Road to the East/West Regional Trailhead and Pavilion parking lot. During Phase 1, Douglas County also approved a 100-day temporary closure of Grigs Road between Daniels Park Road and the trailhead and pavilion parking lot, from July 7, 2025 through October 15, 2025, weather permitting.
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