The rolling Belgian province of Limburg is a special piece of nature just across the border with the Netherlands. This beautiful tour, which you can cycle as a package with route 133168, leads you through the beautiful Gruitroderbos. The 660-hectare forest is located on the Kempen Plateau and is part of the Duinengordel nature reserve. The dunes in the area were formed around 10,000 years before Christ in the Ice Age. The pine forests on the ancient hill were planted in the first half of the twentieth century. The coal mines needed wood and these forests had to meet that need.
Between the coniferous forests lie small parts of the original Gruitroderheide. Here you can also see some drifting sand areas here and there. Since 2008, these areas have been expanded and a long strip of coniferous forest has been cleared to give the heath and dunes more space. The Gruitroderbos and the Gruitroderheide provide shelter for rare animals: the forest stream damselfly, the palmate newt, the wood cricket, the grey shrike, the green sand tiger beetle, the common blue and the red wood ant have found their place here. Birds of prey skim over the treetops in search of a juicy field mouse or a tasty rabbit: the presence of the buzzard, hawk and honey buzzard is the rule rather than the exception. You might also come across the smooth snake, which lies sunbathing on the sand near the fens or slides through the forest in search of prey.