Mount Grenville is the highest summit of the Homathko Icefield of the Pacific Ranges of the Coast Mountains, east of the head of Bute Inlet. It has a height of and a prominence of .[1] It is located at the southern edge of the icefield and is one of a large group of summits in this region to be named for figures of the Elizabethan era, or with other Elizabethan associations (e.g. the icefield includes Armada Peak and Galleon Peak).