Trail Maintenance Groups

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The POST Partners Volunteer Program helps organize and oversee three trail maintenance groups in Town: The Ridgeline Wranglers, Rhyolite Dirt Crew and Keepers of the Rock. Together, they dedicate hundreds of hours each year to maintaining our numerous soft surface trails within the Town of Castle Rock.   

2022 Season

  1. 2022 Ridgeline Wrangler Maintenance Event Schedule

    Saturday, Aug. 6 (rain date Aug. 13)
    Saturday, Sept. 17 (rain date Sept. 23)
    Saturday, Oct. 15 (rain date Oct. 22) *End of Season Party after final outing!

    Event times are 8:30-11:30 a.m. Register for these volunteer events at Volunteer Castle Rock ( 

    2022 Rhyolite Bike Park Maintenance Event Schedule

    Once a month on Tuesdays 5-6:30 p.m.

    Register for these volunteer events at Volunteer Castle Rock ( 

  1. Keepers of the Rock
  2. Rhyolite Dirt Crew
  3. Ridgeline Wranglers

Maintaining our Town's namesakeKeepers of the Rock Logo_Transparent background

Keepers of the Rock is an all-volunteer group that adopted the Town’s namesake Rock Park on July 12, 2004, in hopes of making significant improvements to the area. 

These volunteers are in-tune with Rock Park’s environment and are committed to sustaining the park for the enjoyment of the people who use it. The group conducts monthly restoration outings from April through November in partnership with the Town’s Teen Court program, as part of the POST Partners program. 

This partnership and the volunteer efforts at Rock Park were featured in the Summer 2016 issue of American Trails Magazine.  

With these joint efforts, Keepers has been able to accomplish the following:

  • Trail resurfacing, stabilization and tread repair
  • Wildland protection: ongoing social trail closures and reclamation
  • Catch basin and rock dam maintenance for erosion control
  • Corridor vegetation clearing
  • Brush fence repair
  • Retaining wall construction and repair
  • Timber step installation and repair
  • Knapweed abatement and control
  • Trash collection
  • Willow removal
  • More than 10,540 hours of volunteer time over the last 10 years
  • 619 Teen Court youth have served the community at Rock Park since the inception of the Keepers of the Rock / Teen Court partnership.

Keepers of the Rock Founding MemberDennis Carnahan 2020

Dennis Carnahan is a founding member and was a Crew Leader for the all-volunteer group, Keepers of the Rock. The group helps maintain Rock Park, the Town’s namesake. Dennis volunteered for 16 years, until his retirement in 2020. As one of the Town’s most dedicated volunteers, Dennis Carnahan truly represents one of the main goals of the POST Partners Volunteer Program, which is to build community pride in the Town’s parks, opens space, and trail areas. He has previously been honored as a Community Champion by the Colorado Parks and Recreation Association, recognized as a 7Everyday Hero by Denver 7 News and recently a Cornerstone Tribute Panel installed at Rock Park. Dennis has had a lasting impact on the conservation of Rock Park and a key hand in ensuring the park is here for future generations to hike and enjoy.