Freecampsites.net is fantastic (minus the UI which leaves a lot to be desired, and can be problematic on mobile). I used it extensively over the past two months

Freecampsites.net is fantastic (minus the UI which leaves a lot to be desired, and can be problematic on mobile). I used it extensively over the past two months as I roadtripped across Colorado/Utah/Arizona/Nevada. It has a neat trip planner feature where you put your route and it will show you all the places along the route where you can camp. It's not a complete source of information since it's community submitted, so I often cross-reference these other two sites: https://freeroam.app https://freeroam.app https://www.campendium.com/ https://www.campendium.com/ It's important to read the reviews of each campsite, since sometimes they will say things like "road is inaccessible without a high clearance vehicle" or "now private land; camping is no longer possible". Also, make sure you pick a few nice places and jot down their coordinates BEFORE you get there. In my experience, most BLM land doesn't have the best (if any) cell service, so YMMV.