Roll out from Parkeerplaats Bültsee und Umgebung and let the route unfold: first the Bültsee und Umgebung nature reserve, then the Schlei nature reserve, before the Bültsee lake itself and the Schirnau river. The 64.3 km loop climbs 331 m, mixing 70% paved with 31% unpaved. It all comes back to where you started.
