Six tar sand deposits in the intermountain west, each containing more than 1 billion barrels of oil in place, are identified. All of these deposits are in eastern Utah and contain a total of 28 billion barrels of oil. The six deposits, arranged in descending order of desirability for large-scale surface mining oil recovery operations, are as follows: Sunnyside, Tar Sand Triangle, Asphalt Ridge, P.R. Spring, Circle Cliffs, and Hill Creek. An overview of each deposit is presented including geology, surface mining variables, chemical processing variables, environmental aspects, and economics. A comparison of Utah tar sands and Athabasca, Alberta, Canada, tar sands is also presented. The report contains an extensive bibliography of publications on tar sand deposits, mining, and processing methods.