This route is the main Paiute ATV Trail loop as marked in the National Geographic map starting and finishing at Fremont Indian State Park and Museum.
From paiutetrails.com:
"The Paiute Trails are a network of dirt roads and trails looping in and out of the mountains of central Utah. The trail is currently managed by the Fishlake National Forest (which the Paiute Trails ride through) and the Richfield BLM Office.
The trail occasionally crosses through charming small-towns such as Marysvale, Koosharem, Monroe, and others. As the trail meanders across this area, it racks up over 1,500 miles of terrific trails, perfect for 4×4, SxS, & ATV riding.
These trails offer much more than just thrilling off-road adventure. These trails include historic Native American sites as well as historic mining sites & Mormon pioneer heritage. They also include a plethora of outdoor recreation at State Parks, National Forest, resorts, etc. That’s not all, the Paiute ATV Trail is nestled close to some of Utah’s beloved national parks, such as Bryce Canyon National Park & Capitol Reef National Park."