Cane Creek Mountains 300–350 million years ago during the formation and rifting of Pangaea. This earlier range is thought to have had peaks more than high, which would rival the Himalayas, the Andes, and the Alaska Range. However, erosion has worn this old mountain range down. The highest peaks of this old range are now found in the Appalachian Mountains on the eastern coast of North America and in the Anti-Atlas Mountains of Morocco in Africa. The heavily eroded hills of piedmont, including the Cane Creek Mountains, are remnants of the sizable mountain chain. The Cane Creek Mountains lie in the Carolina Slate
Siskiyou Mountains 1910, pears had begun to replace apples as the major fruit grown in the region. In 1927, the Jackson County seat moved to Medford, which had become much larger than Jacksonville. The highest peaks in the range include Mount Ashland at an elevation of , Dutchman Peak at , Siskiyou Peak at , and Wagner Butte at , all of which are in Oregon. The highest peak in the California portion of the range is Preston Peak at . There are also several lower mountains, including Negro Ben Mountain, which reaches . The main drainage basins in the mountains are