Katy Trail State Park

The longest developed rail trail in the country runs 240 miles across Missouri between Clinton and Machens, on hard crushed limestone along the old Missouri-Kansas-Texas line. The grade is relatively flat end to end, and most of it closely follows the Missouri River. What makes it easy for a casual group is the access: 26 trailheads, four restored depots and small railroad towns such as Rocheport and Boonville, with Hermann a short ride over the river bridge from McKittrick. Amtrak stops at Hermann and Washington, both just across the river, and takes bikes for an extra fee, so a one-way ride back to the car is simple. The whole trail typically takes five to seven days; a 20- or 30-mile section between two towns makes a relaxed day out.