Nullo Mountain is a high mountain plateau to the north of Dunns Swamp with spectacular views over the Wollemi Wilderness and the Widden Valley.
Accessible by car, head north from Rylstone along Bylong Valley Way, turning right into Cox's Creek Road after a couple of kilometres. Follow to the end and turn left into Nullo Mountain Road. Follow to the end. Notice one of Australia's highest vineyards up there. This is part of Louee's vineyard, you can sample their wines at Lowe Wines, Tinja lane at Mudgee.