In our travels this summer, we came across a fun section of paved trail in Maryland. While staying at https://jellystonemaryland.com Yogi Bear Jellystone campground in Williamsport MD, I was looking for something to do with my older son. Google maps showed a bike trail-head with a parking lot within biking distance from the campground. Off we went to find an old C&O Canal rail trail. Once there it became apparent that the site was a US National Park and in conjunction with Maryland civil war trails. Although we only went about 5 miles or so up the trail, it was fun and interesting. Heavy vegetation, old infrastructure, paved trail, and even primitive camping spots can be found along the route.
As always, thank you for reading, and get outside