Unauthorized Trail Rehabilitation

Why Unauthorized Trails Are a Problem

Unauthorized, or “social”, trails emerge when visitors create unplanned shortcuts or wander off designated routes, often harming sensitive habitats and causing erosion. 

Many social trails start with good intentions, but unmanaged routes can cause long-term problems:

  • Environmental damage – erosion, habitat fragmentation, and impacts to wildlife and water.
  • Safety risks – steep, unstable, poorly designed, or trails without navigational aids can increase injuries and rescues.
  • Legal and funding risk – agencies face liability and grant eligibility may be jeopardized.
  • System impacts – unmanaged trails pull users away from sustainable, planned trail systems.

Photos of Unauthorized Trails and Damage Caused to Natural Resources

Project Overview

NoCo Places is working with partners and volunteers to map, prioritize, and rehabilitate these trails across the NoCo region. Our phased approach—from GIS scoping to field mapping and a new interactive dashboard—supports informed, equitable, and sustainable stewardship across jurisdictions.

Phase 1: Background Research and Scoping

  • GIS Basemap creation
  • Hotspot prioritization for each entity
  • Online research: resulted in 203 possible locations for unauthorized trails
  • Field Research: visiting locations in the field for possible unauthorized trails

Phase 2: Trail assessment and Mapping Inventory

  • GPSed unauthorized trails/roads to create inventory of linear features/miles with select attributes assigned
  • GPSed georeferenced photos/waypoints of unique identifiers

Phase 3: Compiling the Data

  • Data formatting and edits
  • Provide spatial inventory of unauthorized trail/roads as linear and point features in format compatible with GIS systems (shapefile)
  • Provide georeferenced photos to as unique identifiers to illustrate what is occurring

Methodology to Research Unauthorized Trails

  • Publicly available basemaps and data layers
  • Social platforms that collect user data
  • Field visits

Current Work

NoCo Places is working on the next phase of the unauthorized trails project. RRC Associates developed an unauthorized trails dashboard, similar in design to the mobile phone data dashboard, which enabled NoCo land managers to view the prevalence and impacts of unauthorized trails on the NoCo landscape at a regional level.

The trail data came from existing unauthorized trails mapping that each agency had undertaken, plus the over 345 miles of unauthorized trail data collected last summer by NoCo Places. This data was overlaid with NoCo’s biodiversity mapping, allowing land managers to develop a prioritized list of actions for these identified trails. As a result of the developed criteria, trails may be rehabilitated, continue to be monitored, or, in some cases, become part of an existing trail system.

While the data NoCo has is by no means a complete picture of unauthorized trails across the region, the dashboard allows additional mapping and data collection to be added as it becomes available.

Larimer County Conservation Corps Trail Crew

NoCo Places is partnering with the Larimer County Conservation Corps on the trail restoration this summer and fall. Work began on June 22, 2026, and will continue into October. 

 

Worksites & Plans

Site 1: Beaver Ranch Park, Jefferson County Parks & Open Space, June 22 - July 2

Work Completed: The crew focused on restoring unauthorized trails which were causing erosion and drainage issues by replacing lost material and covering routes with forest debris. The crew completed about 1 mile worth of trail restoration throughout the park which has greatly reduced habitat fragmentation and added to the buffer zones for wildlife from visitor use. They completed 0.5 miles of trail restoration and closure. 

Work Completed:

  • Regrading of trail sections to remove edges of trail treads and create a more uniform cross grade to disguise the existence of unauthorized trails 

  • Spreading slash and organic material over the unauthorized trail sections to create physical and visible barriers to users

  • Installing of rock features to prevent further erosion and create areas where sediment can build up to naturalize unauthorized trails 

Work Completed: In addition to mapping and decommissioning unauthorized trails, the crew is working with the US Forest Service to document unauthorized signage and campsites.

More updates coming soon.

Note: the Larimer County Conservation Corps crew came in following work performed by a US Forest Service crew. The Corps is helping to finish out the remaining work.

Worksite Photo Gallery

Photo Credits: Anne Ludolph, Grady Hall, Katie Matthews, and LCCC

"Tread Talk" Video Series

In our “Tread Talk” video series, NoCo stakeholders and agency staff share the different ways that unauthorized trails have a negative cumulative effect over time.

 

Authorized trails are planned and built by land managers through careful evaluation of the landscape, wildlife habitats, water movement, and historic and cultural resources. 

 

Learn more in the video clips below featuring the Continental Divide Trail Coalition, Larimer County Natural Resources, and History Colorado.

 

Playlist

8 Videos

Stay Tuned

Please check back soon for our continued progress on this project or contact us with any questions.

Thank You to Our Grant Funders

CPW and GOCO logos

This project was made possible with grant funding from Great Outdoors Colorado and Colorado Parks & Wildlife through the Regional Partnerships Initiative Grant Program.

Project Quick Links

Watch our Tread Talks!