Hikers on the sand dunes, Great Sand Dunes National Park and Preserve, with Sangre Cristo Mountains in the background, Colorado, United States of America, North America

travel destination photography vertical hikers sand dunes great sand dunes national park and preserve sangre cristo mountains colorado landscape scenics non urban scene day sand mountain beauty in nature three people unrecognisable person full length side view snow sky cloud brown national park dry arid extreme terrain rolling landscape mountain range journey adventure lost hiking togetherness scale shadow outdoors usa us united states united states of america north america american north american colour image colour color image color outside travel destinations travel scenery scenic scene scenes nature the natural world landscapes natural beauty clouds cloudy