If “go big or go home” is your battle cry, immediately add the Katy, the longest developed rail trail in the country at 240 miles, to your bucket list. A good portion of the Show-Me State stretch, which practically spans the width of the 24th member of the U.S., follows in the footsteps of Lewis & Clark’s 1800s expedition as it winds along the mighty Missouri from Machens to Boonville before shooting south and ending near the shores of another of Missouri’s best water features, Lake of the Ozarks.