This National Scenic Byway traverses Crowleys Ridge, a crest that rises out of the otherwise flat Delta region. The unusual landform is an erosional remnant of the Ice Age, carved out over millions of years by torrential rains. It has been built up even further over the past 12 million years by glacier gravel and windblown loess. The ridge begins in Missouri, just below Cape Girardeau, and forms a crescent shape ending in Helena.
Recreational opportunities along the route include four state parks, a national forest, and wildlife management areas–offering everything from fishing, boating, swimming, picnicking, hiking, and wildlife watching opportunities.