Mitchell Peninsula is a rocky peninsula

Peninsula

A peninsula is a piece of land that is bordered by water on three sides but connected to mainland. In many Germanic and Celtic languages and also in Baltic, Slavic and Hungarian, peninsulas are called "half-islands"....

, 2.5 nautical miles (4.6 km) long and 2 nautical miles (3.7 km) wide, lying between O'Brien Bay

O'Brien Bay

O'Brien Bay is a bay lying between Bailey Peninsula and Mitchell Peninsula on the Budd Coast. First mapped from air photos taken by U.S. Navy Operation Highjump and Operation Windmill in 1947 and 1948. Named by the Advisory Committee on Antarctic Names for Lieutenant Clement E. O'Brien, United...

 and Sparkes Bay

Sparkes Bay

Sparkes Bay is a bay, 1 nautical mile wide and indenting 2.5 nautical miles between Mitchell Peninsula on the north and Robinson Ridge and Odbert Island on the south, in the Windmill Islands. First mapped from air photos taken by U.S. Navy Operation Highjump and Operation Windmill in 1947 and 1948...

 at the east side of the Windmill Islands

Windmill Islands

The Windmill Islands are an Antarctic group of rocky islands and rocks about wide, paralleling the coast of Wilkes Land for immediately north of Vanderford Glacier along the east side of Vincennes Bay...

. First mapped from aerial photographs taken by U.S. Navy Operation Highjump in February 1947 and thought to be an island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 connected by a steep snow ramp to the continental ice overlying Budd Coast

Budd Coast

Budd Coast , part of Wilkes Land, is that portion of the coast of Antarctica lying between the Hatch Islands, at 109°16'E, and Cape Waldron, at 115°33'E. It was discovered in February 1840 by the U.S. Exploring Expedition under the leadership of Lieutenant Charles Wilkes, and named by Wilkes for...

. The term peninsula was considered more appropriate by the Wilkes Station

Wilkes Station

Wilkes Station was an Antarctic research station established 29 January 1957 by the United States as one of seven U.S. stations established for the International Geophysical Year program in Antarctica...

 party of 1957. Named by the 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 Captain Ray A. Mitchell, U.S. Navy, captain of the USS Cacapon, tanker of the western task group of U.S. Navy Operation Highjump, Task Force

Task force

A task force is a unit or formation established to work on a single defined task or activity. Originally introduced by the United States Navy, the term has now caught on for general usage and is a standard part of NATO terminology...

68, 1946-47.