Mount Gower (also known as Big Hill),[1] is the highest mountain on Australia's subtropical Lord Howe Island in the Tasman Sea.

With a height of 875 metres (2,871 ft) above sea level, and a relatively flat 27-hectare (67-acre) summit plateau, it stands at the southern end of Lord Howe, just south of the island's second highest peak, the 777-metre (2,549 ft) high Mount Lidgbird, from which it is separated by the saddle at the head of Erskine Valley.

Ascending Gower entails a popular, guided, strenuous 8-hour return hike, though no special climbing skills are needed.

The mountain is covered with rainforest, including cloud forest at the summit, containing many of the island's endemic plants.

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