Oriented samples of rocks of Jurassic age were collected from 24 separate sites located in southern and southwestern Alaska. Paleomagnetic measurements were made on these rocks, and various selection criteria were applied to obtain a mean Jurassic paleopole position of 50°N and 295°E with an α95 of 14.2°. This pole position is displaced from the mean paleopole of North America in the opposite direction to that predicted by Carey's orocline hypothesis for the development of Alaska. Based on this pole position, northward movement and clockwise rotation of southern Alaska must have occurred since Jurassic times, perhaps in a manner analogous to the motion of Baja California today. This Baja–Alaska model for the tectonic development of southern Alaska is currently being tested.