Hells Half Acre Wilderness Study Area has 1 named peak. The highest is Twentymile Rock at 1,568 m.
There are 1 named mountains in Hells Half Acre Wilderness Study Area. The highest and the most prominent mountain is Twentymile Rock.
The highest peak in Hells Half Acre Wilderness Study Area is Twentymile Rock, at 1,568 m.
Notable peaks in Hells Half Acre Wilderness Study Area include Twentymile Rock.
