kevin from Jeff City on 8/22/2013 12:56:10 PM:
From Jeff City, you are on city streets for a mile or so to the bridge, which has a bike/ped path. From there, it is path or lightly trafficked streets to the trailhead. About 3.5 to 4 miles, total. Easy riding, although there are a couple of hills in JC between the station and the bridge.
Can't tell you about Sedalia, though. Sorry.