Carn nan Tri-tighearnan is a Graham of 614.8 m in Highland. Its closest neighbour in this register, Carn na h-Easgainn, is 10.5 km away.
All four of its nearest neighbours are higher, up to Geal-charn Mor at 824.1 m. It is one of only two register hills in the Inverness to Strathspey region, with Carn Glas-choire. Only 19 of the 737 hills profiled in Scotland are lower. All four of its nearest neighbours lie to the south, so it stands at the northern edge of its group. Its nearest higher summit, Carn an t-Sean-liathanaich (633.2 m, 8.3 km south-east), is a listed top not profiled here. It is 250.9 m below the average height of the 427 register hills in Highland. The summit is marked by a trig point.
