The Great Drumtochty Challenge is a 5 hour mountain bike orienteering competition which is open to all abilities of cyclist, family, solo, team, mixed and all ages with categories from Parent and Offspring to Super veteran The Great Drumtochty Challenge is a one day mountain bike orienteering competition which was started in 1998 by the Brechin Cycle Club The event is based on the tried and tested "Polaris" format and as such we would like to thank all the Polaris team for inspiring this event