Although it is not too long, this is a very scenic and beautiful trail. In the 2nd week of November, I rode from the Mark's Creek Trailhead (near Ashland City) all the way to the Cheatham Dam Campground. Although the fall color was, unfortunately, well past its peak, at least you had much better views of the river with all the leaves gone.
There is a steep embankment of high hills which run along the river. This trail is generally about halfway up with tall rock outcrops on one side of the trail and nice views of the river on the other. Being a rail trail, it is very flat and doesn't gain (or lose) much elevation throughout. There are small trestles/bridges over several side streams with one large trestle over Sycamore Creek. From here there are beautiful views of both the creek and the Cumberland River.
About a half mile north of Sycamore Creek, the paved portion of the trail ends at Chapmansboro Road. There is a parking area there at the Eagle Pass Trailhead. If you continue north, the trail is hard-packed gravel. It is not recommended for road bikes but fat tires can make it without much problem.
The 2 ½ mile section of trail for Eagle Pass to the Cheatham Dam Campground is similar to the paved section. Just north of Eagle Pass, there is an interesting structure that I wasn’t sure what it was. It looks like a small stone/mortar arch shaped room with a wooden door. It looked very old and I guessed that it was some type of storage shed for the railroad.
One word of caution: About a half mile from the north end of this section of trail, there is a bridge missing. It looks like it has been gone for a long time. The trail veers toward the river and goes down to the creek bed (which was dry when I saw it) then goes back up to the old railroad bed and the rest of the trail. It is not really hard to get by this section but there is no warning and the trail down to the creek bed is fairly steep and rocky. I made it ok but next time I will walk my bike through this section. It really isn’t bad but it can surprise you if you aren’t looking for it.
At the north end of the trail is the Cheatham Lake Lock A Campground. It was closed when I came through so I had to ride another couple of hundred yards to get to a point where the roads were open. The campground is part of an Army Corps of Engineers Recreational area here. If you keep going north from the campground, past the swimming area (in the river), you will reach Cheatham Dam. It is about a mile and a half from the campground.
All in all, the Cumberland River Bicentennial Trail is a very pretty rail-trail. I look forward to riding it again in the spring when the flowers are in bloom. I just wish it were a little longer.