Precipitation runoff from the mountain's slopes drains into tributaries of the Jollie River.

Topographic relief is significant as the south face rises 1,000 metres (3,281 feet) in one kilometre.

[5] This mountain's toponym was applied by Thomas Burnett to honour William Grant (1843–1910), New Zealand shepherd, livestock dealer, and landowner.

[6] Prevailing westerly winds blow moist air from the Tasman Sea onto the mountains, where the air is forced upward by the mountains (orographic lift), causing moisture to drop in the form of rain or snow.

The months of December through February offer the most favourable weather for viewing or climbing this peak.