Big Lost River Rest Area Hwy 20

Sitting along Highway 20 east of Arco, this rest area doubles as an overnight stop for travelers crossing central Idaho's high desert. Four covered picnic tables sit east of the main rest area building, with grassy patches nearby that can accommodate tents. Camping status is ambiguous. No signage prohibits it, but none explicitly permits it either, so RV travelers overnighting here tend to feel more at ease than tent campers. The facility includes a restroom building with a drinking fountain, trash bins, and reported cell service. Pets are allowed. Reviewers note the site stays clean and sits away from highway noise, with open sightlines toward the surrounding desert terrain. It works best as a one-night layover rather than a destination camp.