A map of Passport and Places to Go locations for National Historic Trails.
Tallgrass prairie once covered 170 million acres of North America, but within a generation most of it had been transformed into farmland. Today less than 4% remains intact, mostly in the Kansas Flint Hills. Established on November 12, 1996, the preserve protects a nationally significant remnant of the once vast tallgrass prairie ecosystem. Here the tallgrass makes its last stand.