Named for their hazy, blue appearance at sunrise and sunset, the Smoky Hills divide the more easterly mixed-grass prairie from the shortgrass prairie of the Western Great Plains. The Smoky Valley Scenic Byway travels through the Smoky Hill River Valley, a showplace of native grasses and wildflowers year-round. Purple and bright-yellow coneflowers species, red-and-yellow Indian blanket flower, sky-blue pitcher sage, and cream-flowered yucca mix with big and little bluestem and grama grasses. Croplands provide additional color washes of emerald-green winter wheat in early spring and russet, ripened milo in autumn. Rock outcroppings hint at the foundation underlying the landscape - chalky limestone left by ancient seas.
Crossing the Smoky Hill River Valley, the Smoky Hills Trail was established at the Civil War's end to carry goods and travelers, including bona fide gold diggers, from Fort Leavenworth to Denver. Although it provided the shortest route to Denver, the trail was considered dangerous, and travel often required the protection of troops stationed at nearby Fort Hays. Carvings and markings can still be seen where trail travelers carved their names on the walls of Threshing Machine Canyon near Cedar Bluff State Park. Today, two limestone markers identify the trail's crossing along the Byway.
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