The narrowest distance between mainland Alaska and mainland Russia is approximately 55 miles across the Bering Strait. Between these two landmasses lie the Big Diomede Island (Russia) and Little Diomede Island (USA), which are only about 2.5 miles apart. During winter, the water between these islands can freeze, allowing a theoretical walk between the US and Russia on the ice

. If you meant the size or travel distances within Alaska itself, the state measures about 1,420 miles north to south and 2,500 miles east to west

. Distances between major Alaskan cities vary widely; for example, Anchorage to Fairbanks is about 360 miles, and Anchorage to Seward is about 128 miles by road

. If you were asking about something else related to "AK" or "how far is AK," please clarify for a more specific answer.