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

Privacy Policy:

What’s New

Version 1.4.3

- Stability Improvements

Ratings and Reviews

4.3 out of 5
131 Ratings

131 Ratings

Locologo94 ,

Been Waiting for This!

Finally a trail navigating app that is run by the people that control the trails! I only just downloaded the app, I will update this review when I take it out and use it around the Taylor Park area. Huge props for actually having the trail names on here, instead of just the trail numbers. That one feature makes it better than the other apps that I have been using for trail navigation. One suggestion to the developers: take the community aspect of this app to the next level. Make it to where you can add friends and leave comments on each trail that can either be seen by friends only, or the public. This would enable people to warn trail goers of dangers (rockslide, fallen trees, etc.). Also make it to where you can form a group. Say you are riding with 4 other people that each have their own OHV/ATV. You could share a pin/waypoint with the whole group so that if anyone gets separated, they would know where to go. Add the ability to send a distress call, that can be seen be sent to all nearby app users as a push notification. (For example: “Ran out of gas”, or “rollover, broken leg, need help”). This app is already amazing, but also has so much more potential! Thanks devs!

Developer Response ,

Thanks for the suggestions – we’re always evaluating ways to improve the experience! One thing you can do today is post Trip Reports, associated to either existing trails or a Trip you’ve recorded, and tag specific users for notification. You can also tag specific users on your own Trips, Field Notes, and Custom Routes. Finally, each of those can also have visibility set to Public, Private, Unlisted, or Tagged Users. Trip Reports will always be publicly visible, however. Don’t hesitate to email us anytime at if you have other questions or suggestions.

JRH10101 ,


While the app is pretty decent once you get the hang of it, it still isn’t no onX. I like that it can track you but it get very annoying having to turn my screen back on every couple of minutes while I’m trail riding taking my eyes off the road and a hand off the wheel which can always be dangerous. I would love to see a new feature where the phone screen doesn’t time out and shut off while you are using the app.

Mark & Linda ,

This is the hiking app I have always wanted!

We have used this app on 4 hikes so far, and it has been fantastic! Every time the trail is vague or has multiple forks, this gives you the guidance you need. We went to a popular trailhead on the weekend that was packed. My wife joked that it looked like the security line at the airport. We used this app to find a nearby trail where we met zero other hikers in 5 miles, and the views were fantastic. It was so nice knowing exactly where you are on the trail, and knowing all the nearby trails. We also love the ability to download map blocks so you aren’t lost when there’s no cell service.


State of Colorado Governor's Office of Information Technology
129.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
This app may use your location even when it isn't open, which can decrease battery life.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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