Copper Mountain Ski Resort, near the town of Frisco in Summit County, Colorado - Original image from Carol M.… Free Image from public domain license 
Trees get a white winter glaze in Yellowstone National Park. Original image from Carol M. Highsmith’s America, Library… Free Image from public domain license 
Trees get a white winter glaze in Yellowstone National Park. Original image from Carol M. Highsmith’s America, Library… Free Image from public domain license 
Winter wonderland, created by a sudden mountain blizzard along California Highway 36, south of Lassen Volcanic National Park. Free Image from public domain license 
Old Mammoth Road. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced… Free Image from public domain license 
