Cheyenne Frontier Days, held annually since 1897, in Cheyenne, Wyoming, USA, claims to be one of the largest outdoor rodeo and western celebrations in the world. The event, which occurs during 10 days centered around the last full week in July, draws close to 200,000 people to the area every year. Lodging fills up quickly during the peak tourist season throughout southern and eastern Wyoming and even into Colorado and Nebraska.