REI Co-op Guide to National Parks is your comprehensive guide to hiking and site seeing in our National Parks.

• Currently packing complete trail data and hike descriptions for many of your favorite National Parks, including life-list destinations like Yellowstone, Yosemite, Grand Canyon, Zion, Grand Teton, Mount Rainier, Point Reyes, Rocky Mountain, Zion, Acadia and many more!
• Search for hikes using the map or a park's “best of” list curated through star rankings from the community.
• Never get lost again! See your live position on a terrain or satellite map and vertical profile
• No cell signal needed. The data is available offline, and your phone uses its built-in GPS to show your location.
• Plan the perfect trip for you, using our hike difficulty ratings, elevation profiles, star ratings, and informed insights on seasons, camping and lodging, guided tours, food and drink, and more.
• Traveling with kids? We have an expert-selected list of Family Friendly Hikes. Want to target the park’s most beautiful features? View our list of Gems.
• Other cool features: Create a to-do list, track your hikes, or send your exact location to help in case of emergency.
• The app is completely free--it’s our gift to you as part of the National Park Service's Centennial Celebration.

By using GPS, we can show your location on trails and vertical profiles. Continued use of GPS running in the background can dramatically decrease battery life.

What's New

Version 3.1.5

- Bug fixes and improvements

Ratings and Reviews

4.8 out of 5

308 Ratings

308 Ratings

Best Hiking App for US national Parks!!

Dennis hwa

Great Features include:

1. Offline maps all automatically included in the app. No need to manually download and no premium fees like AllTrails
2. Great details of trails with long descriptions, sometimes even history of the trail and it's landmarks. Yes, landmarks along the trail are included with its own description and photos!
3. Add to to-do list and track your hikes!
4. Beautiful app with no lag!

Now that I have a taste of the app, here are some wishlist for future updates:

1. Add more parks. Include more national monuments! I can offer to help with descriptions and photos if the team needs help!
2. Add international parks! Again, I would love to help with this if the team is shorthanded!
3. Add achievements. Add networking with friends to share hikes achieved! Already linked with facebook. Should not be a problem to incorporate. However, this feature should not come at the expense of the primary function of the app - no lags or crashes due to this added feature.

Keep up the good work!

Don't know what I'd do without it!


I hiked Acadia solo for the first time and read somewhere that I should download this app. I'm so glad I did! It works offline and has extremely detailed trails as well as recommendations and pictures. I got lost at one point and had no service in the park and the only way I got out of it and knew where I was because of this app. It also helped me navigate around the whole island since most of the island didn't have service and I couldn't use Google Maps. Definitely the best app to use for national parks!

A must have of visiting any major NPS park

Ghost 9-4

I hate writing reviews, but I'm actually taking the time to write one for this app. Amazing, super intuitive, super easy navigation, and best of all everything is available offline!

This features even family friendly places specific to each park you're looking up!

If you're traveling to any of the major national parks like Yosemite or Grand Canyon, download this app!


Recreational Equipment, Inc
138.3 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Danish, French, German, Japanese, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2015 Adventure Projects Inc.


  • Family Sharing

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

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