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Completion Date
June 2022
Current Phase

Project Overview

OSMP is constructing a new three-mile loop trail – this new route will bring people to many of the existing popular locations on Anemone Hill, and some new areas. Additionally, existing undesignated trails in the area that are in poor condition and which negatively impact habitat will be closed and re-vegetated to reduce impacts to the environment.

View a map of the planned project.

What can I expect to see during the project?

  • Mechanized equipment is being used for this project. Helicopters are expected to be used for mobilizing materials for some aspects of the work.
  • Rockfall control fencing will be installed on the eastern part of Anemone Hill – this is needed to prevent rockfall over Boulder Canyon during construction. This barrier will be removed before project completion.

When is this project occurring?

The project began in June 2020 and is expected to be complete in June 2022.

Why is this project being done?

The new trail will replace existing trails, which have significant erosion and widening issues. These issues are negative impacts to the surrounding environment and are impossible for OSMP to adequately maintain. OSMP trail staff and ecologists have collaborated on the trail design with the goal of providing a fantastic recreational opportunity for trail users while minimizing negative impacts to the environment and habitat.

The Anemone Hill project is part of the OSMP West Trail Study Area (WTSA) management plan, which was approved by OSMP’s Board of Trustees and Boulder’s City Council and involved significant public input.

Project Updates

December 2021: The Anemone Loop Trail will be open Thursday, Dec. 23, through Tuesday, Jan. 4. Starting Wednesday, Jan. 5, weekday closures from 5 am to 5 pm will resume.

November 2021: The new Anemone Loop Trail opened to public use at 5 pm Friday, November 19. The trail will initially be open on evenings and weekends only – it will be closed from 5 am - 5 pm Mon-Fri while the trail contractor finishes trail repair work to the lower approach trail. Please stay on-trail and follow signage to allow closed areas to fully re-vegetate – an on-trail requirement is in-place and enforceable to support ecological restoration of the area. View the new trail on OSMP’s interactive map at OSMPtrails.org – best access is from Centennial Trailhead and The Peoples' Crossing Trailhead. Learn more about the construction of the new trail.

October 2021: Starting as early as Wednesday, Oct. 13 the Anemone Hill area closure will switch from a workday/workhour closure to being closed 24 hours per day, 7 days per week. The new closure is expected to last approximately four weeks. During the four-week closure, crews will focus on preparing the new trail for opening, closing and re-vegetating closed trails and installing directional signage. The closure will be posted at www.OSMPTrails.org.

After the approximate four-week closure, the new Anemone Hill trail system will be open to public use during evenings and weekends. During workdays between 5 a.m. and 5 p.m., Monday through Friday, Anemone Hill will be closed as trail construction work continues on the lower/east approach section. The trail is anticipated to be fully open in early 2022, but the construction schedule is dependent on winter weather conditions.

August 2021: The helicopter work on Aug. 17 is complete.

May update: Helicopter hauling on May 24 was a success! OSMP’s contractor utilized a helicopter to haul 64 pallets of stone (average 1500 pounds per pallet) to be used for constructing stone steps on the new Anemone Hill Trail. The entire helicopter operation lasted about 4 hours. OSMP thanks the Boulder community for respecting the area closure to help make helicopter work efficient and safe.

February Update: Trail construction is continuing over the winter as weather allows on the new Anemone Trail loop. The existing Anemone Trail has been re-opened, while an area closure is in-place where trail construction is actively continuing. The area has been signed accordingly. Please stay out of closed areas due to rockfall risk, mechanized equipment, and rock blasting in these areas, and do not remove or damage signs. Trail closures are expected to change as-needed for public safety and project efficiency as work continues.

Why are trail closures needed?

Mechanized equipment, rock blasting, rockfall, and other construction hazards necessitate closure of Anemone Hill trails during construction hours.

Anemone Hill trails are expected to be open evenings and weekends.

Nearby trails, especially around the Centennial and Settlers Park Trailheads and the Red Rocks Area, will have short-term closures when heavy equipment and helicopters are operating in the area to support the Anemone Hill project.

PLEASE DO NOT ENTER CLOSURE AREAS OR REMOVE CLOSURE FENCES AND SIGNS – doing so puts yourself and other visitors at risk, slows down construction, and increases project costs. No trespassing in closure areas. Violators will be ticketed and fined up to $1000 and/or 90 days in jail.