Upshur County is at the center of the Appalachian Mountain region. Temperature and precipitation vary with elevation. The mountain ridges that run through the county are covered by forests and separated by narrow river valleys. In all, most of the county is forested, providing abundant biomass potential. The flat-topped highlands and rounded hills contain much of the county’s coal, the state’s most abundant mined product. Natural gas, crude oil, and natural gas liquids are gaining greater importance with the development of production from the Marcellus and Utica shales in the state.