The Marlborough Forest is the centerpiece of this loop route. Within the forest's area are myriad trails and old unmaintained roadways, providing wonderful access to this huge natural tract. Much of the land is owned by the crown, though it is mixed in places with private land. There are several provincially significant wetlands in the forest: the Brassils Creek Wetland, the Steven Creek Wetland and the Richmond Fen Wetland. The latter is the home of the Ottawa area's only known Yellow Rail colony. The Rideau Trail has a 16 km segment through the forest. Snowmobilers and skiers keep several other trails open.