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 3.1.8

This update adds additional trail content.

Ratings and Reviews

4.8 out of 5
496 Ratings
496 Ratings
Curinne33 ,

Been there..

Just wish I could “check off” when I’ve been to a park.

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.

Evereddie60 ,

Just like the REI stores this app is incredible

This is a must have app. Fantastic layout and information. Will be using it this weekend at Valley Forge. Maps, guides, walking and hiking guides, family friendly options and much more info. LOVE IT! Thank you REI.


Recreational Equipment, Inc
172.6 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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