A public consultation on how best to maximise the potential of the land is now being carried out.
The commission hopes to expand the existing forest with new planting and draw on the area's tourism opportunities. The land features waterfalls and a natural pool in which Rob Roy McGregor is said to have watered his cattle and stayed for weeks unnoticed by his pursuers.
Environment minister Michael Russell said: "This is a golden opportunity to help urban people enjoy more woodland. With public transport links already in place, the land would only be a short trip for many people living in the surrounding towns and the city of Glasgow."