The Gammon Ranges are part of the northern Flinders Ranges, immediately southwest of and adjacent to Arkaroola Sanctuary. They encompass some of the most rugged and spectacular country in South Australia.
The central ranges are of a different topographical nature to the rest of the Flinders, being composed of roughly flat-lying strata, creating a high plateau into which spectacular gorges have been cut, instead of the buckled and folded strata further south which lead to the ubiquitous cuestas of Wilpena Pound. The Gammons are dominated by "The Plateau" in the southwest, which is contiguous with and of much the same height as the Blue Range further northeast, culminating in Benbonyathe Hill (1064m), the highest point in the Flinders north of Wilpena.
Some of the most interesting features of the ranges are these deep gorges cut in the south-eastern side of the Blue Range: Bunyip Chasm, The Terraces, and Fern Chasm are all areas often visited by bushwalkers. Although lower than the mountains which surround it on three sides, the dramatic Cleft Peak is also often visited, so-named for a spectacular cleft separating it into two summits, and providing opportunities for rockclimbing to a summit, not often necessary with peaks in the Flinders.