There are forest walks from the town of Dalbeattie. Park at the Dalbeattie Town Wood car park (charges apply).
For mountain biking, go to the 7stanes Dalbeattie car park (charges apply). As well as more adventurous trails, they have a family-friendly green trail that is mainly on forest tracks. There is also a blue route too if people are up for some hills, routes, and some rocks.