AllTrails - Explore over 50,000 trails, reviews, and photos. Share them…
Komoot - Plan Your Perfect Hiking, Mountain Biking or Road Biking Adventure
Strava - The #1 app for runners and cyclists
Gaia GPS - Trail maps for all your adventures
Trailforks - World's largest trail database and management system for trail associations, builders and riders. Started for mountain biking trails, now including all trail uses.
OsmAnd - Global mobile map viewing and navigation for online and offline OSM maps