Gruelopene is the set of races that make Grue Norway's fastest running town. From the flat, fast half marathon course, via the family-friendly Gruemila, to the gruelling challenge of Gruebackyard – together they show off everything the town has to offer.

Behind the events stands Grue Idrettslag (the local sports club), with plenty of help from local volunteers, sponsors and enthusiasts who put in a big effort every year so runners get an unforgettable experience.