http://www.solavaca.com/

The Frozen Endurance series consists of three separate off-road XC endurance-style events. Each race offers a 4 and 6 hour category, with individual age/gender classes for each. Race begins at 9am on each date and begins with a LeMans-style start. Pre-registration is $35 per racer for all classes/divisions. DORBA members are eligible to receive a $5 rebate on race day at registration. The total race field is limited to 300 racers per event, so register early! Don't miss out!.

CATEGORIES AND CLASSES
6-hour:
Solo Men
Solo Women
Solo Single-Speed Open
2-perosn Relay Men
2-person Replay Women
2-person Relay Co-ed
2-person Relay Adult/Youth

4-hour:
Solo Men
Solo Women
Solo Single-Speed Open