The TREK Runcatrail from Naraus to Flims is in the medium difficulty range and offers experienced riders, as well as beginners, a whole lot of variety. The TREK Runcatrail was designated a Flow Country Trail by the IMBA (International Mountain Bike Association) in Autumn 2012. Stretching 6 kilometres, the TREK Runcatrail is the longest Flow Country Trail of its kind in Europe.