Cnoc Coinnich is a Graham situated on the Ardgoil Peninsula in the Argyll & Bute council region and forms part of the Arrochar Alps. A Graham is the term used to define a Scottish mountain between 611 and 761 metres (2,000 and 2,499 feet) in height.
At 761 metres (2496 feet) Cnoc Coinnich misses out on being classed as a Corbett by a solitary metre. At one time Cnoc Coinnich claimed top place on the Grahams list by virtue of alphabetical supremacy over Sgurr a’Chaorainn, a mountain of equal altitude. Subsequently, when Beinn Talaidh was demoted from being a Corbett to being a Graham, alphabetical ascendancy has hence relegated Cnoc Coinnich to second place on the Grahams list despite being of an equal size.
Cnoc Coinnich is topped by a small cairn at grid reference NN233007.