Anacapa Island is the Smallest of the four Northern Islands. It is almost five miles long, but only 1/4 to 1/2 mile wide. It is actually composed of three islets, east, middle and west. The three islets are 1.1 square miles in size, and contain approximately 700 acres. The island lies eleven miles from the mainland. In 1980 Anacapa Island became one of the five islands include in Channel Islands National Park.