Let’s be honest: when you think of sand dunes, Nebraska probably doesn’t top the list. But the Nebraska Sandhills, the Western Hemisphere’s largest system of sand dunes, have been quietly covering about 20,000 square miles (52,000 square kilometers) - roughly a quarter of the state - with their grassy, rolling beauty. The sand originally came from the Rocky Mountains, carried by rivers during the Pleistocene, then sculpted by drought winds blowing from the north or south. About 3,500 years ago, grassland vegetation stepped in and said, “Okay, that’s enough,” stabilizing the dunes into the rippled pattern we see today.
Some of the biggest dunes near the northern edge stand up to 400 feet (120 meters) high and stretch for miles. Their northern slopes are gentler than their southern ones, a clear tell that northerly winds were the main sculptors - though in other areas, symmetric dunes suggest winds from both north and south took turns, like a seasonal tug-of-war.
The grasslands now serve as prime pasture for cattle, especially after the Kinkaid Act of 1904 gave ranchers 640-acre parcels to settle. Today, half of Nebraska’s nearly 23 million acres of rangeland and pastureland are in the Sandhills, and cattle vastly outnumber humans. Some ranchers even graze their herds in patterns meant to mimic the bison that once roamed there - because who needs original thought when you have history?
Protected areas like Crescent Lake National Wildlife Refuge, on the southwestern edge, feature wetlands that act like sponges, soaking up precipitation and recharging groundwater instead of letting it run off. The refuge sits along the Central Flyway, making it a pit stop for migratory birds - dozens of waterfowl, marsh birds, and shorebirds - plus turtles, whooping cranes, western prairie fringed orchids, and Topeka shiners. Yes, a fish named after a city in Kansas.