271 reviews
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About this app

Discover and explore Colorado’s unique trail experiences with the Colorado Trail Explorer. Available for free, COTREX offers the most comprehensive trail map available for the state and is built atop data from over 230 trail managers.

View trails by allowed uses on the map, browse featured routes, download offline maps, record trips and notes in the field, complete challenges to earn badges, and share your experiences with the community. COTREX is your gateway into Colorado’s magnificent outdoors.


– Browse or search to find trails and Feature Routes that match your activities or interests.
– Change activity type to dynamically filter trails on the map.


– No cell coverage? No problem! Download maps ahead of time for a continuous experience that doesn’t depend on your network.
– COTREX offline maps are lightweight in size and easy to download.


– Capture the details of your outdoor experiences by recording Trips.
– Go beyond simple photos by taking and classifying rich Field Notes along the way. Choose from 45,000+ classifications that include trail conditions, species, rocks and minerals, historic places, points of interest, and much more.
– Seamlessly sync activity recorded on your devices with the web.


– By recording and classifying Field Notes, you can complete Challenges and earn Badges for your profile.


– Inform and inspire the entire COTREX community by sharing your Trips and Field Notes publicly or submitting Trip Reports.
– View activity feeds for all users or just the ones you follow.
– By sharing your experiences, you also help to inform trail managers about current conditions on the ground.


The Colorado Trail Explorer endeavors to map every trail in the state of Colorado in support of the Colorado the Beautiful Initiative. COTREX connects people, trails, and technology by coordinating the efforts of federal, state, county, and local agencies to create a comprehensive repository of recreational trails for public use.

This project is led by Colorado Parks and Wildlife (CPW) and Department of Natural Resources, but is only made possible through partnerships with organizations at every level statewide. COTREX represents a seamless network of trails managed by over 230 land managers.


[Battery Life] We do everything we can to make the app low power when recording, but GPS is notorious for reducing battery life

Terms: https://trails.colorado.gov/terms
Privacy Policy: https://trails.colorado.gov/privacy
Updated on
May 6, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

257 reviews
Kevin Gillotti
June 24, 2022
well designed app, but it's got a few bugs 1) when your vehicle goes off the map it does not recenter the map, so you have to manually do it. sketchy when you're 4x4 driving. 2) it's a bummer I can't go back & add campsites or parking lots to a map track I saved. you can edit a few things, but you should be able to go & add more "field notes" you couldn't do real time. 3) "keep screen on" is finicky. I had to toggle on/off 2-3x to get it to stick. 4) no running "activity"?
18 people found this review helpful
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A Google user
August 13, 2019
Excellent trail map for ATV riding. We used it this past weekend for the first time and barely scratched the surface of it's functions. It was awesome to have the offline capabilities and with it's constant update as to our position on the trails, it definitely kept us from getting lost in the high country. We'll be using this app now to find new places to ride and explore as much of Colorado as can. Thanks to the developers for a great app!
22 people found this review helpful
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Maggie Michalowski
August 16, 2023
+ Easy to track routes or make your own after the fact or as planing Downloadable maps is awesome Great info on all the trails I know of Elevation gain and loss (when it works) Free - Had to reinstall because it couldn't find my location Doesn't say trail difficulty. Would be a major plus for mountain biking Elevation gain/loss is buggy. By definition if I travel on a loop they should be equal but one is often several hundred feet off from the other Sometimes can't figure out that trails connect
5 people found this review helpful
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What's new

- Wildfires and Prescribed Burns are now on the map
- Stability Improvements