What parallel runs through Alaska?

The parallel that runs through Alaska is the Arctic Circle, which is located at approximately 66.5 degrees North latitude. This circle marks the southernmost latitude at which the sun can remain continuously above or below the horizon for 24 hours, especially during the summer and winter solstices. Parts of northern Alaska, including areas like Barrow (Utqiaġvik), experience polar day and polar night due to their location relative to the Arctic Circle.