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National Park Trail Guide

National Park Trail Guide

Adventure Projects

Trail maps and guides for many National Parks and surrounding areas.

4.5 Ratings 2K+ Reviews 100K+ Downloads

Ratings & Reviews

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  • img Community
    Don't you wish you could get away from all the tedious phone calls, emails and heated online discussions? Sometimes, going out into the wild is the only way. With REI, you will have 100's the hiking trails, camping grounds and national parks near you at your fingertips.
    img by Antonio
    2 years ago
  • img Community
    Whether you want to spend 3 hours or 3 weeks exploring the different parks in the United States, you want a good guide. This will help you see what they have to offer and help make your trip amazing.
    img by Sharon
    1 year ago
  • img Community
    It's easy to get lost exploring one of the 54 hiking trails of the Grand Canyon. Add poor cell signal to the equation and your online map will prove useless. REI provides you with an excellent offline map as well as accurate trail data and hike descriptions curated by users.
    img by David
    1 year ago
  • img Community
    Not everyone knows enough about America's 61 national parks to truly appreciate them. If you feel like you need a tour guide, the REI app will serve that purpose well. Apart from a collection of navigational and safety features, it also offers a guide to some of the most iconic places.
    img by David
    1 year ago
  • img Community
    Overcrowded cities are well capable of destroying your desire to travel. Instead of visiting a tourist hotspot, perhaps it may be better to have an adventure off the beaten path. Going camping or exploring any of the USA's 61 national parks could be the way to go.
    img by John
    1 year ago
  • img Community
    Once you start exploring the natural wonders of Utah, you will soon realize that you can't just sleep anywhere. The national parks are protected and you need to look for designated areas for visitors. This app will help you pick among 100s of camping spots close to the most amazing trails.
    img by Steve
    8 months ago
  • img Expert
    1. Find the best hikes based on community ratings from places like Yosemite, Zion, and more. Narrow your search for kid-friendly hikes
    2. No cell signal needed! Track your position and elevation live with GPS on an offline map. Need help? Broadcast your exact location
    3. Explore hike ratings, lodging and permits, elevation profiles, seasonal insights, and more - collect your favourites into handy lists

    Reviewed by Laura S on January 24, 2018

  • Awesome app Nov 16, 2020

    By mpc64
    There’s so much info here it’s great. Just about every NP is covered and even some National Monuments and such. But what really impressed me was today when I was at Pinnacles NP I wanted to make sure I was going the right way on a trail in a place where I had no cell service s nothing else would even work. I opened the Trail Map and not only did it show all the trails, but it pinpointed where I was on the trail exactly. Thinking it may have been a lark I continued on and then tried it again. It took a second or two to update and then had moved my location along the trail. I moved off the trail a bit and even then it updated my location in relation to the trail and the parking lot I was headed to. I don’t know whether that works in all parks or not, but it was pretty amazing and may actually save people who’ve lost track of a trail, if they can see exactly where they are in relation to the trail, even in areas where there’s no cell service. Not sure how that works, but I was impressed.
  • Mar 30, 2021

    By Kendall Miller
    Just downloaded it and went to my state, Idaho, and for some reason there is no data whatsoever ever in the entire state xD
  • As a parkie, this is THE BEST app Nov 23, 2020

    By Grand Teton Man
    I spent last summer as an employee in GTNP and can say that this is the singles best app for hiking in the national parks. The map feature is amazing and intuitive, the trail profiles are super helpful, and the trails that have guides are very well written and helpful. Being able to see my location on the map even without service saved me a few times while hiking through the Utah desert. There are a few glitches every now and then, especially when switching between screens or trying to search for a trail, but overall works very well. If only this app worked outside the national parks.
  • Awesome app Nov 16, 2020

    By mpc64
    There’s so much info here it’s great. Just about every NP is covered and even some National Monuments and such. But what really impressed me was today when I was at Pinnacles NP I wanted to make sure I was going the right way on a trail in a place where I had no cell service s nothing else would even work. I opened the Trail Map and not only did it show all the trails, but it pinpointed where I was on the trail exactly. Thinking it may have been a lark I continued on and then tried it again. It took a second or two to update and then had moved my location along the trail. I moved off the trail a bit and even then it updated my location in relation to the trail and the parking lot I was headed to. I don’t know whether that works in all parks or not, but it was pretty amazing and may actually save people who’ve lost track of a trail, if they can see exactly where they are in relation to the trail, even in areas where there’s no cell service. Not sure how that works, but I was impressed.
  • Mar 30, 2021

    By Kendall Miller
    Just downloaded it and went to my state, Idaho, and for some reason there is no data whatsoever ever in the entire state xD
  • As a parkie, this is THE BEST app Nov 23, 2020

    By Grand Teton Man
    I spent last summer as an employee in GTNP and can say that this is the singles best app for hiking in the national parks. The map feature is amazing and intuitive, the trail profiles are super helpful, and the trails that have guides are very well written and helpful. Being able to see my location on the map even without service saved me a few times while hiking through the Utah desert. There are a few glitches every now and then, especially when switching between screens or trying to search for a trail, but overall works very well. If only this app worked outside the national parks.
  • Feb 6, 2021

    By Frank Clarkston
    Excellent app. Lots of great trail info and maps.
  • So much better than I thought! Jul 29, 2020

    By LilyAAG
    Really like this app! So useful with being able to find hikes offline and seeing where you’re at. The location is pretty darn accurate. I also really like how it tells you the elevation and mileage at various points of the hikes. Also so nice that you can add hikes to your “to do” list and then mark them as complete when you’ve done it! Some things that would be great to improve/add. One is there may be some glitch with adding “Gems” to your Completed list, it won’t let you for some reason. And it’d be great if the map can overlay the hikes you’ve already done so it’s easy to see where you’ve been, plus just would be super cool to look at
  • Nov 12, 2020

    By Patrick Horton
    This is good, but I wished that it had many more parks or the option to add more. I downloaded it to see what it had on the State Park that's in the same county as me, but it doesn't have anything on it. I would use it if it had all state parks.
  • Best hiking app! Oct 6, 2019

    By Grand canyon R2R
    I cannot say enough about how great this app is. I just hiked Grand Canyon rim to rim and used this all along the way. Clearly there is no service in the canyon but the app still worked and showed us all along the way exactly where we were. We were able also to navigate to side hikes and know we were on course. We threw out paper maps and just used my phone for this app. After the Grand Canyon we went to Bryce NP and were sore so not wanting to do big hikes so we just focused on seeing the gems rei suggestions and they were all amazing. Thank you rei for a great app!
  • Dec 2, 2020

    By J Charbo
    Used the app travelling across country. Good detail on maps and trails... Enjoyed using it to explore parks we would consider visiting in the future.
  • best app; will have used in 20+ NPs Jul 23, 2020

    By NationalParks2020
    I’ve never left a review anywhere before, but I had to say that I used this app for all my hikes on a national park road trip and it is so useful, especially in parks due to low/no service and data. The hikes and gems descriptions are so helpful, and I can see the profile, current position on my hike, the grade, etc all within the app with no internet. The my list function is a little finicky, and I wish you could just see a map of only the things you want to do, but this app is still so worth it.
  • Aug 7, 2019

    By Ted Hersey
    This is a great app. We have used to prepare and hike through several National parks. It is beautifully designed and great for getting prepped and ready for a hike. Please ignore the ridiculous 1 star reviews that it doesn't cover a state park or forest near them, no this is for the USA National Parks. Check out REI's hiking project app for lots of other great hiking info.
  • Useless Oct 24, 2020

    By Triippp
    There is no list of parks anywhere to be found! I did find a way to get to the map, but the map does not show anything other than the name of the parks. You can see the geography And the town’s but there’s no indication of trails or park features anywhere . Pretty much useless! Well, after 4 months I get a response to my review. And it looks like some people have been waiting since January and February. At this point it looks like they rebuilt the entire app. Their solution was to delete and reinstall. Their updates did absolutely no good. I can’t say that I am encouraged by their lack of communication. I will not be giving them any more stars.
  • Jan 16, 2021

    By Tina Wimberley
    Downloaded the app for National Parks, but it doesn't even cover Canada! Looks like it might have been a great app, if it would've had what I needed. Uninstalled.
  • Used to be a good app. May 23, 2020

    By Karen LH
    I don’t know what happened with the last update. The app no longer works on my iPad. The nice UI that allowed you to easily get to the National Park that you want to see is gone. Instead, you get a screen that says “Guides in progress” and trying sort by most popular or alphabetically does nothing. If you attempt a search, you end up back on the search page with no parks found. Did Adventure Products take over this app and try to make it like their other products? If so, it was a bad idea—I can’t even get a park to come up, so I can’t review the trail information.
  • Oct 31, 2020

    By Kevin K
    Beautifully built app with lots of potential. Too bad that it doesnt offer directions to get to these places
  • Crashing! Dec 3, 2018

    By Angrymonkeymermaid
    After the latest update it keeps crashing when trying to open it. And yes I have done everything: unloading and redownloading, shut down phone, exit and restart app. But to no avail. I use this app everytime we go to Acadia, although makes me wish we had more national parks in the Northeast, but I’m planning a road trip to Yellowstone this upcoming year and need this app to work. App is great for a good starting point when planning a trip and other info. If the app stops crashing then I’ll bring the app back again to 5.
  • img Community
    Don't you wish you could get away from all the tedious phone calls, emails and heated online discussions? Sometimes, going out into the wild is the only way. With REI, you will have 100's the hiking trails, camping grounds and national parks near you at your fingertips.
    img by Antonio
    2 years ago
  • img Community
    Whether you want to spend 3 hours or 3 weeks exploring the different parks in the United States, you want a good guide. This will help you see what they have to offer and help make your trip amazing.
    img by Sharon
    1 year ago
  • img Community
    It's easy to get lost exploring one of the 54 hiking trails of the Grand Canyon. Add poor cell signal to the equation and your online map will prove useless. REI provides you with an excellent offline map as well as accurate trail data and hike descriptions curated by users.
    img by David
    1 year ago
  • img Community
    Not everyone knows enough about America's 61 national parks to truly appreciate them. If you feel like you need a tour guide, the REI app will serve that purpose well. Apart from a collection of navigational and safety features, it also offers a guide to some of the most iconic places.
    img by David
    1 year ago
  • img Community
    Overcrowded cities are well capable of destroying your desire to travel. Instead of visiting a tourist hotspot, perhaps it may be better to have an adventure off the beaten path. Going camping or exploring any of the USA's 61 national parks could be the way to go.
    img by John
    1 year ago
  • img Community
    Once you start exploring the natural wonders of Utah, you will soon realize that you can't just sleep anywhere. The national parks are protected and you need to look for designated areas for visitors. This app will help you pick among 100s of camping spots close to the most amazing trails.
    img by Steve
    8 months ago
  • img Expert
    1. Find the best hikes based on community ratings from places like Yosemite, Zion, and more. Narrow your search for kid-friendly hikes
    2. No cell signal needed! Track your position and elevation live with GPS on an offline map. Need help? Broadcast your exact location
    3. Explore hike ratings, lodging and permits, elevation profiles, seasonal insights, and more - collect your favourites into handy lists

    Reviewed by Laura S on January 24, 2018

  • Awesome app Nov 16, 2020

    By mpc64
    There’s so much info here it’s great. Just about every NP is covered and even some National Monuments and such. But what really impressed me was today when I was at Pinnacles NP I wanted to make sure I was going the right way on a trail in a place where I had no cell service s nothing else would even work. I opened the Trail Map and not only did it show all the trails, but it pinpointed where I was on the trail exactly. Thinking it may have been a lark I continued on and then tried it again. It took a second or two to update and then had moved my location along the trail. I moved off the trail a bit and even then it updated my location in relation to the trail and the parking lot I was headed to. I don’t know whether that works in all parks or not, but it was pretty amazing and may actually save people who’ve lost track of a trail, if they can see exactly where they are in relation to the trail, even in areas where there’s no cell service. Not sure how that works, but I was impressed.
  • As a parkie, this is THE BEST app Nov 23, 2020

    By Grand Teton Man
    I spent last summer as an employee in GTNP and can say that this is the singles best app for hiking in the national parks. The map feature is amazing and intuitive, the trail profiles are super helpful, and the trails that have guides are very well written and helpful. Being able to see my location on the map even without service saved me a few times while hiking through the Utah desert. There are a few glitches every now and then, especially when switching between screens or trying to search for a trail, but overall works very well. If only this app worked outside the national parks.
  • Feb 6, 2021

    By Frank Clarkston
    Excellent app. Lots of great trail info and maps.
  • Best hiking app! Oct 6, 2019

    By Grand canyon R2R
    I cannot say enough about how great this app is. I just hiked Grand Canyon rim to rim and used this all along the way. Clearly there is no service in the canyon but the app still worked and showed us all along the way exactly where we were. We were able also to navigate to side hikes and know we were on course. We threw out paper maps and just used my phone for this app. After the Grand Canyon we went to Bryce NP and were sore so not wanting to do big hikes so we just focused on seeing the gems rei suggestions and they were all amazing. Thank you rei for a great app!
  • Dec 2, 2020

    By J Charbo
    Used the app travelling across country. Good detail on maps and trails... Enjoyed using it to explore parks we would consider visiting in the future.
  • best app; will have used in 20+ NPs Jul 23, 2020

    By NationalParks2020
    I’ve never left a review anywhere before, but I had to say that I used this app for all my hikes on a national park road trip and it is so useful, especially in parks due to low/no service and data. The hikes and gems descriptions are so helpful, and I can see the profile, current position on my hike, the grade, etc all within the app with no internet. The my list function is a little finicky, and I wish you could just see a map of only the things you want to do, but this app is still so worth it.
  • Aug 7, 2019

    By Ted Hersey
    This is a great app. We have used to prepare and hike through several National parks. It is beautifully designed and great for getting prepped and ready for a hike. Please ignore the ridiculous 1 star reviews that it doesn't cover a state park or forest near them, no this is for the USA National Parks. Check out REI's hiking project app for lots of other great hiking info.
  • Great Interface, Works Well Apr 16, 2020

    By Mr_Blazevich
    Very user friendly! I’m excited to get back out to the parks and try it out. Sometimes park resources don’t boil it down to the few things you really need to see and this app is perfect for that. This is a great app for studying up on a park before visiting in conjunction with other resources. This app isn’t a standalone resource for all of your outdoor needs; you should still use alltrails/guthook and bring paper maps and ask rangers for suggestions, but what a great additional resource this is!
  • One of BEST apps I’ve used Sep 3, 2018

    By Shredded Thumb
    I have 50+ apps on my iPhone and this is one of the top ones. I wish more apps did this — all content is available offline and combined with GPS location services, you can easily navigate your progress on one of our NP trails while you hike. That’s really important because usually you can’t get cellular data service while hiking in the wilderness. We’ve been using it in Yellowstone and Grand Teton parks and it’s been more helpful than the NPS hard copy maps! Thanks REI, GREAT work!
  • Dec 2, 2020

    By Tomi Davis
    Great info for novice hikers and those of us who just love little hidden treasures near better known trails.
  • So much better than I thought! Jul 29, 2020

    By LilyAAG
    Really like this app! So useful with being able to find hikes offline and seeing where you’re at. The location is pretty darn accurate. I also really like how it tells you the elevation and mileage at various points of the hikes. Also so nice that you can add hikes to your “to do” list and then mark them as complete when you’ve done it! Some things that would be great to improve/add. One is there may be some glitch with adding “Gems” to your Completed list, it won’t let you for some reason. And it’d be great if the map can overlay the hikes you’ve already done so it’s easy to see where you’ve been, plus just would be super cool to look at
  • Feb 13, 2019

    By A Google user
    Pretty nice app. Some road names don't show up even when you zoom in, which kind of sucks. Also, the most annoying feature I have found about this app is that when you back out of a particular trail description page the app always takes you back to the beginning of the trail list. I just don't understand.
  • Fantastic app, just needs a little more work Aug 5, 2020

    By MaeFun
    I’ve had this app for about a year now, and it’s worked absolutely perfectly! There is one thing though that is annoying, and that’s the inclusion of NPS units that aren’t National Parks. It would be great if there was a way to filter those out, maybe through a main menu screen giving the option to chose from “National Parks” and “All National Park Service Units”. Another thing is that the map for the territory of Virgin Islands National Park does not include the “newly” acquired Hassel island off of St. Thomas. But other than that, this app is phenomenal and deserves a ton more attention!
  • Great App! Oct 13, 2020

    By Shea al'Thor
    This app is fantastic for visiting parks. I’ve used it on several trips now and it makes planning and exploring super easy! Only issue I have with it is that there isn’t a way to delete downloaded content after your trip. So after a while the app had several gigabytes of data downloaded to my phone (hike paths, park info, photos, trail ratings etc.) Being able to download parks for offline use is super handy for when traveling outside of cellular coverage, but we need a way to delete the data when we no longer need it.
  • They destroyed the app Oct 24, 2020

    By weswilson4
    Unclear why the development of the app necessitated having to delete it and download it again, but it’s working again. They have a lot of national parks but not all. It would be nice to see the parks on a national map so you could see which ones are near you — even those that don’t have guides. Also, having just used it, the Grand Canyon would be slightly more helpful if it was split between north rim and south rim.
  • Mar 30, 2021

    By Kendall Miller
    Just downloaded it and went to my state, Idaho, and for some reason there is no data whatsoever ever in the entire state xD
  • Nov 12, 2020

    By Patrick Horton
    This is good, but I wished that it had many more parks or the option to add more. I downloaded it to see what it had on the State Park that's in the same county as me, but it doesn't have anything on it. I would use it if it had all state parks.
  • May 9, 2019

    By Mike McMahon
    The idea is good. However, you can find info on the best known National Parks anywhere. As this is app has REI associated with it, I expected more"off the beaten path content". l want to be informed of places I wouldn't otherwise know about in an app like this. The content it does have is great quality. And it is free. But you need to try harder to improve and expand your content.
  • Jul 26, 2020

    By Aaron Bruderer
    I was looking for a detailed, interactive, physical map. This has that, but I wish there were better labels for the geography (e.g. Fruita Cliffs, Navajo Sandstone domes). It's just Google.
  • Jan 16, 2021

    By Tina Wimberley
    Downloaded the app for National Parks, but it doesn't even cover Canada! Looks like it might have been a great app, if it would've had what I needed. Uninstalled.
  • Oct 31, 2020

    By Kevin K
    Beautifully built app with lots of potential. Too bad that it doesnt offer directions to get to these places
  • Crashing! Dec 3, 2018

    By Angrymonkeymermaid
    After the latest update it keeps crashing when trying to open it. And yes I have done everything: unloading and redownloading, shut down phone, exit and restart app. But to no avail. I use this app everytime we go to Acadia, although makes me wish we had more national parks in the Northeast, but I’m planning a road trip to Yellowstone this upcoming year and need this app to work. App is great for a good starting point when planning a trip and other info. If the app stops crashing then I’ll bring the app back again to 5.
  • Useless Oct 24, 2020

    By Triippp
    There is no list of parks anywhere to be found! I did find a way to get to the map, but the map does not show anything other than the name of the parks. You can see the geography And the town’s but there’s no indication of trails or park features anywhere . Pretty much useless! Well, after 4 months I get a response to my review. And it looks like some people have been waiting since January and February. At this point it looks like they rebuilt the entire app. Their solution was to delete and reinstall. Their updates did absolutely no good. I can’t say that I am encouraged by their lack of communication. I will not be giving them any more stars.
  • Used to be a good app. May 23, 2020

    By Karen LH
    I don’t know what happened with the last update. The app no longer works on my iPad. The nice UI that allowed you to easily get to the National Park that you want to see is gone. Instead, you get a screen that says “Guides in progress” and trying sort by most popular or alphabetically does nothing. If you attempt a search, you end up back on the search page with no parks found. Did Adventure Products take over this app and try to make it like their other products? If so, it was a bad idea—I can’t even get a park to come up, so I can’t review the trail information.

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