About Mack, Colorado
Mack is an unincorporated town and a U.S. Post Office located about 10 miles east of the Colorado/Utah border in Mesa County, Colorado, United States. The Mack Post Office has the ZIP Code 81525. Mack is part of the Grand Junction Metropolitan Statistical Area.The town was named after the president of Mack Motor Company, because it was chosen to build the line from the remote Uintah Basin to the railroad, to transport Gilsonite.Mack is a community that is 22 miles west of Grand Junction just north of Interstate 70.The Country Jam Ranch is located near the town of Mack and is known for being a Music Festival Destination. This is a permanent festival site created for music festivals, including Country Jam, an event that has been held since 1992 and one that draws thousands of country music fans to the area.