Mean Commuting Time for Workers (5-year estimate) in Granite County, MT was 22.45859 Minutes in January of 2022, according to the United States Federal Reserve. Historically, Mean Commuting Time for Workers (5-year estimate) in Granite County, MT reached a record high of 27.05584 in January of 2012 and a record low of 21.91606 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Mean Commuting Time for Workers (5-year estimate) in Granite County, MT - last updated from the United States Federal Reserve on May of 2024.