 The road to Powder Mountain is one of the steepest state highways in Utah with an average grade of approximately 14% over .The road from Eden Junction (SR-39 at Pineview Dam) north to Liberty was added to the state highway system in 1933 as a southern segment of State Route 163, and was transferred to State Route 162 in 1935.In 1955, SR-162 was extended north to the forest boundary, and truncated back to Liberty again in 1963.