Glen Canyon National Recreation Area in southern Utah and northern Arizona covers 1.25 million acres, but fewer than 125,000 acres have been surveyed for archaeological sites using modern standards, according to the National Park Service.
National park visitors spent millions in the Yellowstone, Glacier and Grand Teton regions last year, according to a recent accounting by the Park Service.
National Park Service plans predator kill to aid Colorado River fish usatoday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from usatoday.com Daily Mail and Mail on Sunday newspapers.