Craters of the Moon National Monument, ID
OK, so obviously not one of the aforementioned 10 states, but some people consider Idaho part of the Plains. And Craters of the Moon is absolutely worth a mention. Made up of three massive lava fields within Central Idaho's Snake River Basin, this rugged landscape of volcanic cones and sagebrush grasslands also boasts an impressive backcountry for all your hiking and camping adventures.
The one must-do thing: Cruise the main drag, Craters of the Moon Loop Dr, and hike up the Inferno Cone viewpoint for panoramic vistas of the whole scene
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Jay Gentile is a Thrillist contributor and he always plays disc golf in remote state parks. Follow him: @innerviewmag.