Photos from the 2017 Extreme Enduro at the US Trials Training Center in Eastern TN. From the organizer: The TKO is the creation of Dan Brown, the owner of the Trials Training Center, which has hosted National and World Championship Trials events, with assistance from Eric Peronnard, the founder of EnduroCross. The event features a multi-round “Knockout” format. Each round is different as the riders race against the clock in some rounds and head to head in others and they do so on both short and long courses consisting of extremely difficult terrain. All of the action is designed to be very spectator friendly with easy viewing access to many of the most challenging sections.