Where did karana from island of the blue dolphin live before she got stuck in the island?

She used to live in a cave when she got stuck with Rontu Aru.She started living with Rontu Aru becuase Rontu her real dog died when red foxes tried to bite his neck or leg but, his fur was to thick.She was stuck on The Island of the Blue Dolphins for 18 years in till American guys came to rescue her.The sad thing was that she died 6 or 7 weeks after she got rescued but while she was alive she lived with her 2 birds and Rontu Aru.That is how Karana lived her life.