The Wisconsin Endurance Mountain Bike Series is a 12 hour morning to evening and six hour afternoon to evening bike relay event. Teams consist of two to four riders. The classes are male, female and open. Solo events are also available for male, female and singlespeed. There is also a three hour solo event, which starts in the afternoon. Funds raised at these event are used to develop new trails and/or maintain the trails already in use. Each race in the series is an individually organized race offering its own unique experience.