A few weeks ago the National Finals Rodeo announced a deal that will keep them in Las Vegas until at least 2024. The rodeo will remain at the Thomas and Mack Center. Thomas and Mack is undergoing a $72 million modernization project that will improve almost every aspect of the arena, including an addition that will overlook the Las Vegas Strip.
The PBR (Professional Bull Riders) have also signed a multi-year agreement to stay in Las Vegas. The PBR finals will be held at Thomas and Mack one last time in 2015 before moving over to the new MGM-AEG Arena in 2016.
I don't know much about rodeo or bull riding, but I do know that NFR and PBR are pretty big events so this is definitely good news for Las Vegas. They usually bring in tourists during slower times of the year so I expect Las Vegas will do what it takes to keep these events for as long as possible.