CLOSED: The West Trailhead at Alderfer/Three Sisters Park will be closed from May 2025 to January 2026 for trailhead improvements.

Alderfer/Three Sisters Park West Trailhead Improvements

Jefferson County Open Space is improving the West Trailhead at Alderfer/Three Sisters Park, including expanding the existing parking lot, replacing the existing restroom and kiosk, installing improved signage, and improving Bluebird Meadow Trail and Wild Iris Trail. The West Trailhead and adjacent roadside parking will be closed from May 2025 to January 2026. Parking will remain open at the East Trailhead and during non-school hours at Wilmot Elementary School. Limited roadside parking will be available adjacent to the East Trailhead. 

In addition to the Alderfer/Three Sisters West Trailhead Improvement project, Jefferson County Transportation & Engineering will be improving Jefferson County Road 73 from May 2025 – November 2025. Expect additional congestion in downtown Evergreen and along County Road 73. 

Flying J Ranch Park, Meyer Ranch Park, and Lair o’ the Bear Park provide similar opportunities to Alderfer/Three Sisters Park and will be minimally impacted by any summer closures and/or construction work.

Alderfer/Three Sisters Park - West Trailhead Closure Map (PDF)
Before & After View of Proposed West Trailhead Improvements (PDF)
Alderfer/Three Sisters Park, West Trailhead Expansion and Forest Health Projects - Background and FAQs (PDF)

Near the heart of Evergreen, Alderfer/Three Sisters Park has stunning vistas, landmark rock formations, beautiful old stands of ponderosa pine and the most trails per acre of any foothills park.

Alderfer/Three Sisters West Trailhead 5136 South Le Masters Road Evergreen, CO 80439

Alderfer/Three Sisters East Trailhead
30357 Buffalo Park Road
Evergreen, CO 80439

Alderfer/Three Sisters Park Forest Health 2023-2024

In 2023 and 2024 JCOS performed forest health work at Alderfer/Three Sisters Park. For more information please visit the Forest Management page.

Alderfer/Three Sisters Park 2023-2024 Forest Health Project Presentation (YouTube)