Alaska, also known as "The Land of the Midnight Sun", was a state of the United States of America. When the Fifth Doctor and Nyssa visited Alaska in 1994, they both found its pristine ice fields "beautiful". The Doctor called it the "stepping stone between America and Asia". He also noted that it was sparsely populated because it wasn't "the most hospitable of environments". It was rich in natural resources like oil. He went on to say that humans not native to the state were really only interested in Alaska for "commercial or strategic" reasons, but that natives had successfully lived off the land for thousands of years. He also claimed that the name derived from Alyeska, the Aleut word for "great land". (AUDIO: The Land of the Dead)
On a later occasion, the Seventh Doctor claimed that he had never been to Alaska. (PROSE: Cat's Cradle: Time's Crucible) He, Ace and Hex later visited Alaska in 1934 and defeated the Karnas-koi, one of the Elder Gods. (AUDIO: Lurkers at Sunlight's Edge)
Clara Oswald graduated in Alaska.