The nature reserve De Onlanden is very large and therefore there are many beautiful hiking opportunities. We have listed a few:

Round trip from Roderwolde:
Length 5.5km, starting point: parking lot opposite the Woldzigt mill at the Kruiskamp in Roderwolde.
Go through the gate on the right side of the water and follow the purple posts.

Walking around a swamp forest in the Lettelberterpetten:
Length 2.5 km, starting point: Groninger Landscape parking lot, Hooilanden 12.
A nice short walk with a bird hide and a lookout tower.

We have also put together a number of beautiful walking routes for you that you can open with the link below.