Roll out of Kaltenkirchen and let the ride unfold: through the Oberalsterniederung nature reserve, on past the Nienwohlder Moor nature reserve, then along the Alster river and through the Meeschensee forest. Of the 59.5 km, 43% is unpaved, so expect a mix of surfaces under your wheels. With 177 m of climbing, the route keeps things gentle as it loops back to where you started.