Mountain Time (MST/MDT) · Cheyenne · Casper · Jackson · UTC−7/−6
Wyoming is the least populated US state — but among the most geographically dramatic. Yellowstone National Park, the world's first national park (1872), sits in the northwest corner. Grand Teton National Park and the resort town of Jackson Hole draw millions of visitors annually.
Wyoming is a major energy producer — the nation's largest coal producer and a significant source of natural gas and oil. The Powder River Basin contains massive low-sulfur coal reserves. Wyoming also leads the US in uranium production.
All of Wyoming operates on Mountain Time (America/Denver). There are no time zone splits within the state, making scheduling across Wyoming straightforward — unlike neighboring Idaho or South Dakota, which span two time zones.