24 Hours of Adrenalin is a mountain bike event series in North America. In 2005, over 10,000 enthusiasts participated. 24 Hours of Adrenalin claims the title of "fastest growing mountain bike event series in North America".[1] It revolves around a massive relay race, where solo riders or teams of up to ten people compete to ride as many laps as possible in 24-hours, though participants are only required to complete one lap. The race generally favors speed over technical skill and begins with a 600-metre Le Mans start to retrieve bikes. In addition to placings, awards are presented for Best Theme and Best Helmet. First place winners in each category receive a jersey and medal, while other finalists receive prizes donated by sponsors.[1]
The race takes place annually in various cities including:
In 2010 the 12th annual World Solo 24 Hour MTB Championships was held outside of North America for the first time, at Mount Stromlo, Canberra, Australia.[2]
It appears 24 Hours of Adrenalin went out of business after their last 2017 event with venue fees at Canmore Nordic Centre being blamed as the cause.