The best cycling routes in Franklin County

Known locally as “Devil’s Boot Cave,” this natural overhang carved in sandstone resembles the shape of a boot and stretches roughly 25 feet deep and wide, near Marthasville. Once used as a pioneer shelter and noted by local schools for nature trips, the site offers a little geological curiosity beside the trail—a hands-on reminder of Missouri’s limestone landscape and early frontier life. Great for a quick stop and photo op!

Shortly after turning onto Case Road, cyclists enter the 3,520-acre Daniel Boone Conservation Area — part of Missouri’s preserved forestland celebrated for wooded hills, glades, four fishable ponds, and trails that wind through rugged valleys and wildlife habitat, perfect for birding, nature photography, or stretching legs before the climb While the Katy Trail has been smooth and flat up to this point, once you turn onto Case Road and enter the conservation area, expect a steady climb that eventually reaches a challenging maximum grade of about 12% (you may want to walk your bike at this part) This ascent leads you up to the campground within the Conservation Area—so pace yourself, shift into a lower gear, and take short breaks if needed before reaching the ridge and the peaceful campsites above.

Between mile markers 93.2 and 89.0, the Katy Trail offers some of its most breathtaking views of the Missouri River. This section features sweeping vistas of the river, dramatic limestone bluffs, and serene floodplain landscapes. The Missouri River, often called the "Big Muddy" due to its high silt content, is the longest river in North America, stretching over 2,300 miles from Montana to its confluence with the Mississippi River near St. Louis.

This is a paved trail that runs on top of the Levee that protects the Chesterfield Valley from the flood waters of the Missouri River. It is well-used and you can expect to encounter other cyclists, runners, in line skaters, and folks just out for a walk. The Monarch Levee Trail is linked to the World Famous KATY Trail via a separated bike lane on the Interstate 64 bridge across the Missouri River. There are plenty of parking areas along the trail length. I chose the trail head parking off of the Centaur Road. Expect to see wildlife such as foxes, turkey, deer, raccoons, and other critters mainly on the river side of the trail. On the Valley side is an airport, outlet mall, shopping centers, and entertainment venues. If you are looking for a peaceful serene ride this is NOT it. On a historical note, this levee was built after the devastating floods of 1993. This levee is nearly twice as high as the original levee. If you can imagine when you are looking out over the valley, the airport and all the buildings there, that in 1993 there was nearly 20 feet of water covering all of it! Rescue personnel used the interstate, which crosses the valley, as a boat ramp. All in all this is a well maintained wide trail that you will enjoy riding.

During a recent ride on the Monarch Levee Trail, I wanted to explore Howell Island. The map shows that there is a road/trail there HOWEVER, it is gone. The once low water crossing has been entirely removed and replaced with huge stone "rip rap" in its place. So if you are really wanting to see howell island then you will have to cross this large stone rip rap. You will need good hiking shoes and you will need to be very nimble to cross this area. Sorry no pictures, my camera did not save the pictures I "thought" I took of the area.

The Monarch Trail does not go all the way around the Chesterfield Valley unfortunately. It ends towards the East end of the valley right next to the Top Golf Facility. Beyond this point, it is private property. The Komoot Map shows the roads here as private, which is very true. They have no trespassing signs everywhere.

Had to include this very unusual find. I am assuming that this was a family cemetery and when the new levee, on top of which this bike trail runs, was built it must been over the old cemetery. So they relocated the cemetery to the top of the levee. These are very old, dating back to the 1890's. Be respectful and do not desecrate this place.

One of 3 major highway bridges over the Missouri between Weldon and St Charles, MO. The KATY trail through here is as smooth as concrete and the scenery is beautiful!