Ninemile Canyon (Utah)
canyon in Duchesne, Carbon, and Uintah counties in Utah, United States, and an archaeological site and a Back Country Byway
Ninemile Canyon (also Nine Mile Canyon) is a canyon, approximately 40 miles (60 km) long, located in Carbon and Duchesne counties in eastern Utah, United States. Promoted as "the world's longest art gallery", the canyon is known for its extensive rock art, most of it created by the Fremont culture and the Ute people. The rock art, shelters, and granaries left behind by the Fremont make Ninemile Canyon a destination for archaeologists and tourists alike.
The canyon became a main transport corridor in the region during the 1880s. Settlers established a number of ranches in Ninemile Canyon, and even a short-lived town named Harper. No longer heavily traveled, the rugged canyon road was used mostly for recreation and tourism through the end of the 20th century. The discovery of rich deposits of natural gas deep beneath the West Tavaputs Plateau has brought an influx of industrial truck traffic since 2002. The large amounts of fugitive dust produced by the trucks' passage may be damaging the rock art. Public debate is ongoing about how best to balance energy development in the canyon against the preservation of its cultural resources.
Geography
Ninemile Canyon runs roughly southwest to northeast, with numerous winding turns, just to the north of the Book Cliffs, and south and east of Ashley National Forest.
Begin with the source’s own compact description: “Ninemile Canyon (Utah)” is canyon in Duchesne, Carbon, and Uintah counties in Utah, United States, and an archaeological site and a Back Country Byway. The dossier treats that line as a proposition to test through Ninemile, Canyon and Utah, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 2, 2026. The linked authority identifier is Q4312445. VIAF identifies the subject as 315130776. Authority coordinates are 39.776, -110.500. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2002.
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This entry incorporates text from “Ninemile Canyon (Utah)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.