266 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
Feb 20, 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

252 reviews
John Bundy
August 1, 2020
Overall, I love this app! I love being able to download map sections for offline use without having to pay. I use it for every hike I do in Colorado. If it doesn't already have the option, (because I haven't tried yet) It would be nice to have every state have some kind of app similar to this and be compatible so hiking stats from out of state hikes can be saved in the same app. Otherwise, I will have to continue using All Trails everywhere else.
7 people found this review helpful
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A Google user
January 15, 2019
my friend and I used this yesterday on a short hike. we were on a time crunch, but the app kept track of where we were, so when the switchbacks never seemed to end, we were able to use the app to see how much farther we had to go. I like the badges feature, expecily the one for litter. it reminds me of pokemonGo. only issue is I can't find a Que or 'to do' list.
2 people found this review helpful
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State of Colorado - Governor's Office of IT
January 18, 2019
Hi Sophia, we're glad you're enjoying the app! In case you hadn't already discovered, one thing you can do is Star a Trail, Trailhead, or Route. You can then view all Starred content in your profile, both as a list and on the map (for a map view on mobile, tap the down arrow in upper right of the Starred list).
A Google user
July 25, 2019
Wow. This is a free app? Incredible. It's very good for a paid app. It has a limited map set, given. But MVUM, sufficient topo with USFS road numbers, and satellite is all that's needed for overlanding/4wd in particular. Offline downloading is EXCELLENT. Very fast with a great interface. Beats the living pants off Gaia GPS in this regard, which has a terrible download/offline setup that is insanely slow most of the time. To top it off, map scrolling and display speed are crazy fast. A+
7 people found this review helpful
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What's new

Stability Improvements