Vernal is a rural city in Uintah County in northeastern Utah in the United States. It is one of only a few cities in Utah that was not founded by Mormons. The city's Vernal-Uintah County Airport has scheduled air service to Denver provided by Great Lakes Aviation. Service is subsidized by the Essential Air Service program. Vernal does not have air service to Salt Lake City, the capital of Utah. Vernal is situated on a two lane highway, US Highway 40, and is the only city in the U.S. of its size that does not have a railway. A major economy of the town is derived from extracting natural resources throughout Uintah County including petroleum, natural gas, phosphate, and uintaite - more commonly known as Gilsonite.