The Bureau of Land Management's own description leads with the caveat: the canyon is often described as the world's longest art gallery, and it runs 46 miles, considerably longer than its name suggests. Visitors approach from Wellington south of Price, and the canyon holds identified rock art panels and trailheads at Cottonwood Glen, Daddy Canyon, and Cottonwood Canyon, where a Fremont village site sits above the road. The imagery belongs mainly to the Fremont culture, with later Ute and historic-period layers; the Great Hunt panel is among the named compositions.

The canyon is not a park. It is a working landscape of ranches, private inholdings, and an active road, and that mixed ownership shaped its history: gas-field development on the West Tavaputs Plateau in the 2000s raised dust and traffic concerns for the rock art, and the resulting mitigation is documented by the Advisory Council on Historic Preservation as a stewardship case. Community stewardship days organized locally now include volunteers maintaining rock imagery sites. Access is free and continuous, protection depends on visitor behavior, and much of the canyon is private property that must be respected.

Visiting

BLM Nine Mile Canyon. No fee. The BLM Price Field Office (125 South 600 West, Price, Utah) is the contact. Facilities include restrooms and a picnic area at Cottonwood Glen and trailhead parking at Daddy Canyon; a loop is possible via Gate Canyon toward Myton.

Photo: Mramoeba, CC BY-SA 4.0, via Wikimedia Commons ([source](https://commons.wikimedia.org/wiki/File:Petroglyphs_at_Nine_Mile_Canyon_01.jpg))