This is a USAT sanctioned event produced by a USAT certified Race Director. Cave Bear consists of a 2mi run, a 15.5mi bike and a 2mi run. Sabertooth consists of a 2mi run, a 12mi mtn bike and a 2mi run. Woolly Mammoth consists of a 5k run, a 26mi bike and a 5k run. T-REX consists of a 5mi run, a 26mi bike and a 2mi run. All Races will start 600ft in the belly of Natural Bridge Caverns. Entry fees are $65 in advance and $75 for late registration for Cave Bear and Sabertooth. Entry fees are $75 in advance and $85 for late registration for Woolly Mammoth and T-REX. Race day registration is $95. Entry fees are $130 in advance and $150 for late registration for 2 person relay, and $180 in advance and $210 for late registration for 3 person relay.