Wyoming-the first state to allow women to vote, first woman governor in the country. Yellowstone is the first ever national park. Not real positive on this one, but Cheyenne Frontier Days is the largest outdoor rodeo in the world. Someone, correct my if I'm wrong, please. San Luis, my user name, oldest town in Colorado, home to one of two remaining land commons in the U.S., Boston Common is the other. Livestock still grazes in 'The Vega' in San Luis.