This medium sized map is suggested to be an arctic research outpost in Antarctica based on the logo seen below. However, the in-game description says it is in Siberia and there are no trees or bushes in Antarctica. It was most likely under attack by the Americans, or it could have been converted to a military base as Russian vehicles and fighter jets are present there. It snows heavily, much like the map Sub Base from Call of Duty: Modern Warfare 2. It is also slightly reminiscent of the mission "Cliffhanger" in Call of Duty: Modern Warfare 2.
Outpost is a large sized map in Call of Duty: Modern Warfare 3. The map has many long lines of sight that favor assault rifles, light machine guns and sniper rifles. The many buildings, crates and barrels spread around the map that offer for close quarters combat with a sub-machine gun or shotgun. There are few vehicles on the map that mainly include tanker trucks. With an underground station on the other side of the map players can easily hide for cover.
The Weapon Armory is located in the large hangar near Domination Flag C, Explosives Armory near Flag A, and Air Support Armory in the building in the corner of the map on the opposite side of the other two armories. It is possible to get inside the AC-130 hull in the hangar and hide there.
Though the Spetsnaz appear in correct winter gear, Delta Force have their usual Multicam outfits in the map. This includes their ghillie suit, so Delta Force are at a slight disadvantage in terms of blending in with the environment.
Despite the map being located in Siberia (according to in-game description), on the crane near the open area, there is a plaque stating that the base is the "Infinite States of Ward Arctic Research Center" with a picture of the continent Antarctica. "Infinite States of Ward" is a play on words for "Infinity Ward."
There is a teddy bear in the top room of the large tower. It can only be seen when spectating or in Theater Mode.
This is the only multiplayer map in Call of Duty: Modern Warfare 3 to be in snowy conditions.
This map and Carbon are the only maps to have glass on windows in the Wii version.
This map and Discovery are the only maps to be set in Antarctica.