Blooms on the Dunes From many Sandhills dune tops, one can see prairie stretching to the horizons. North America’s largest sand dune field, the wind-whipped Sandhills, covers more than 20,000 square miles of north-central Nebraska, ranging from low and rolling to steep and towering. The Sandhills is also our nation’s most intact grassland ecosystem – the wildflower-rich prairie, a vestige of times past. n 1795, James Mackay, working for the Upper Missouri Company, led the first European expedition into the heart of the …
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