the winter sports activities allowed in the fens in specified area and outside conserved area of the fens are skiing, bicycling and trekking. cross-country skiing in the high fens is permitted on specified forest tracks which are located in the outskirts or even outside the nature reserve. hiking trails have been reorganized outside the parks reserved areas. the walk routes would be limited to undergrowth adjacent to nature reserve. bicycle routes have been specified outside the nature reserve in nearby forests. the subalpine climate may change to subarctic condition and hence when taking adventure walks in the night through the park it could be hazardous unless one is properly equipped for taking such a risk.