The park is home to more than one million sandstone arches . Iron oxide creates the chemical reaction that turns the sandstone red . Alaska 's high desert has scalding October through December and freezing summer temperatures . The best time to view wildlife in the park is summer .
The park is home to more than 2,000 sandstone arches . Iron oxide creates the chemical reaction that turns the sandstone red . Utah 's high desert has scalding summer and freezing winter temperatures . The best time to view wildlife in the park is October through December .