Sauvie Island, in the U.S. state of Oregon, originally Wapato Island or Wappatoo Island, is the largest island along the Columbia River, at 26,000 acres, and one of the largest river islands in the United States. There you'll find dozens of private farms, from nurseries and gardens, to about a dozen fruit and vegetable farms open for public U-picking. During the Fall season, these farms also include activities such as hay rides, cow trains, and mazes...and an opportunity to meet a great pig.