They culminate in the 511-metre (1,677 ft) peak of Stronend, which overlooks Strathendrick and the village of Fintry.
The Boquhan Burn, which runs initially northeastwards, drops over the northern scarp at the Spout of Ballochleam.
[1] Like the neighbouring Gargunnock Hills they are composed of volcanic rocks, mainly basaltic lavas and tuffs erupted during the Chadian to Asbian substages of the Carboniferous period.
The igneous rocks are named as the Clyde Plateau Volcanic Formation, itself a part of the Strathclyde Group.
Dykes of similar composition intrude the lava sequence, notably on the hills' southern flanks.