The 220-hectare Bourgoyen-Ossemeersen Nature Reserve offers wonderful trails for running just west of Ghent old town. It’s mainly a wetlands type area, with a variety of paths and terrain: fields, woods, marshy meadows, and even some modest hills. A loop of the outskirts is ~ 7.5 km. The park preserve site itself has mapped out three loops that are popular for running/walking/hiking. It’s trail running but not challenging.