Rounding┬áup┬áThe Roundup Centre at the Calgary Stampede is expanding to become a world-class, year-round destination. The non-profit organization hosts over 1,200 events every year and is a vital tourism destination for the region. The Calgary Stampede likes to call itself ÔÇ£the greatest outdoor show on earthÔÇØ. It is certainly the worldÔÇÖs largest outdoor rodeo, and one of CanadaÔÇÖs largest annual events, taking place for ten days every summer from early to mid-July.