Winter Park is a home rule municipality in Grand County, Colorado, United States. The permanent population was 999 at the 2010 census, although with 2,572 housing units within the town limits the seasonal population can be much higher.It is home to the Winter Park Resort, a ski resort. The town and resort are served by the Winter Park Express ski train run by Amtrak.Although the town center is at about 9,000 feet above sea level, Winter Park, using administrative boundaries as a measure, became the highest incorporated town in the United States after the July 2006 annexation of 5,214 acres of Winter Park Resort to allow new on-mountain improvements. This claim is disputed since Winter Park has no residences above 9,550 feet, while contiguous residential neighborhoods in Leadville, Colorado, extend to 10,360 feet and in Alma, Colorado, to 11,680 feet, and Alma's town center is at 10,361 feet.The area also has cross-country skiing opportunities, including Devil's Thumb Ranch.