Friday & Saturday, February 20 & 21: Waimea Roundup and Rodeo. Part of the Waimea Town Celebration, this large and diverse rodeo features Team Roping, Barrel Racing, Bronc Riding and Bull Riding. In addition, there are special events done only in Hawai'i. Friday is slack roping and, if needed, other slack competition. Saturday is full final competition. Food concession and craft vendors will be on site.  Friendship Do Ranch at the Old Waimea Dairy Site, Waimea. Friday, 10 a.m. to…