[3] It was named by Major Thomas Mitchell after the three Napier brothers, who he had served alongside during the Peninsular War.

[4] Mount Napier State Park is located 270 kilometres west of Melbourne and 17 km south of Hamilton.

Mount Napier, or Tapoc in the local Aboriginal language, has a composite lava shield with a superimposed scoria cone.

The Newer Volcanics Province covers an area of 15,000 square kilometres (6,000 sq mi) and contains over 400 vents.

The native vegetation of Mount Napier State Park, on the western side of the mountain, varies from grassy woodland to tall open forest dominated by Manna Gum Eucalyptus viminalis, Blackwood Acacia melanoxylon, Austral Bracken Pteridium esculentum and Common Tussock Grass Poa labillardieri.