Wallis Glacier is a glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 nearly 20 nautical miles (37 km) long in the northwest part of the Admiralty Mountains

Admiralty Mountains

The Admiralty Mountains is a large group of high mountains and individually-named ranges and ridges in northeastern Victoria Land of Antarctica...

, Victoria Land

Victoria Land

Victoria Land is a region of Antarctica bounded on the east by the Ross Ice Shelf and the Ross Sea and on the west by Oates Land and Wilkes Land. It was discovered by Captain James Clark Ross in January 1841 and named after the UK's Queen Victoria...

. The glacier flows north and then northwest, eventually coalescing with the lower portions of Dennistoun and Nash Glaciers just before all three reach the sea just east of Cape Scott

Cape Scott

Cape Scott is a cape at the western side of the terminus of Dennistoun Glacier on the northern coast of Victoria Land in Antarctica. Discovered by Captain James Ross, 1841, who named it for Peter A. Scott, Mate on the Terror....

. Mapped by United States Geological Survey

United States Geological Survey

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...

 (USGS) from surveys and U.S. Navy air photos, 1960-63. Named by Advisory Committee on Antarctic Names

Advisory Committee on Antarctic Names

The Advisory Committee on Antarctic Names is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica...

 (US-ACAN) for Staff Sergeant Nathaniel Wallis, who perished in the crash of a C-154 Globemaster aircraft in this vicinity in 1958.