Three 3 day festivals / races - Red Rock Canyon Las Vegas, Grand Canyon North Rim, Bryce Canyon Utah MTB Race, Kid's Events, Family Rides, Food, Live Music
Red Rock Fat tire festival http://www.rrfattirefestival.com/
Grand Canyon Fat Tire festival
http://www.gcfattirefestival.com/
Bryce canyon fat tire Festival
http://www.bcfattirefestival.com/