The Lomond Hills contain two prominent peaks, West Lomond and East Lomond (or Falkland Hill) (), which sit just under apart above a long north and west-facing escarpment over in length. The escarpment, made from beds of sandstone, limestone and a quartz-dolerite sill, rises steeply from the low ground to the north and west to a plateau of around in height between the peaks of East and West Lomond. The western portion of the escarpment runs southwards from West Lomond beyond the deep valley of the Glen Burn (Glen Vale) to Bishop Hill (locally, simply The Bishop) (). The steep-sided peaks of East and West Lomond themselves are volcanic in origin. Along the edges of the sandstone bed at the foot of the scarp slopes are several strikingly eroded outcrops, the most famous of which are the Bunnet Stane and John Knox's Pulpit, so named because it is believed to be a spot where covenanters held conventicles in the 17th century. There are also striking outcrops in the columnar jointing at the edge of the dolerite sill on Bishop Hill, most notably Carlin Maggie.