Whether you’re planning a weeklong excursion or a day trip to one of the 433 national parks, memorials, and historic sites, these apps can guide you on every step of your adventure.

Make the most of a trip to Old Faithful, Half Dome, and other top destinations with the National Park Service app. Get self-guided audio tours, the best spots to catch a sunrise, and interactive maps for Yellowstone, Yosemite, and other popular parks. The app also provides real-time info on crowd conditions and road closures.

Need a campsite? Book reservations using the Recreation.gov app, or find last-minute openings with Campflare, which scans park sites and notifies you the moment a cancellation opens up a spot.

If the marquee parks are full, Hipcamp’s 300,000 listings turn up private spots in backyards and on beaches, filterable by tent sites, RV hookups, and more.

Chimani not only helps you find campgrounds but also cabins, swimming holes, biking routes, and ranger stations in national and state parks across the country.

For a perfect night under the stars (whether that’s camping, glamping, or the ideal plot of dirt), check out The Dyrt. The app has detailed reviews of thousands of campgrounds, RV parks, and other rustic lodgings around the country.

To gear up for your trip and take outdoor-skills classes for beginners and enthusiasts alike, check out the REI app.

Browse the national park guides in AllTrails—or search by city, park, or trail name. Wondering if dogs are allowed or if the parking lot fills up early? With Apple Intelligence integration on iPhone 15 Pro and later, AllTrails now summarizes community reviews.

Strava helps you discover hikes and trails others are exploring. View the Segments near the parks you want to visit, or join communities like Black Trail Runners to find your next adventure.

Wikiloc’s GPS navigator, offline topographic maps, and crowdsourced trail guides help ensure you won’t get lost (unless you want to).

When it’s time to retrace your adventures, Relive turns the routes of your hikes, bike rides, ski runs, kayak adventures, and more into sweeping animated 3D flyovers.

The AR app PeakVisor uses the camera on your iPhone to display the names and elevation of nearby mountains.

Birda encourages you to marvel at the hawks, eagles, and white-breasted nuthatches around you. Keep track of what you’ve spotted, and see which species other users have found.

Planning a sunrise trek or want to photograph a peak just as golden hour hits? Fire up the comprehensive sun-tracking app Lumy.

NatureDose helps you tally how much time you’ve spent in nature—and reminds you how important this is to your overall wellbeing.

If you can’t make it outdoors, listen to Headspace’s National Park sleepcasts to find a moment of calm inspired by the sounds of Joshua Tree, the Grand Canyon, and other parks.

Make a positive impact even when you’re off the trail.

Fight climate change with chilli, which empowers people to take meaningful environmental action by turning simple tasks—like signing petitions, emailing companies, or contacting lawmakers—into collective pressure for structural change.

Sync your financial transactions with Commons to get a better understanding of your carbon footprint while earning cash back when you shop sustainably.