An alternative to road running is trail running. Trails are typically a very narrow (2 feet) path that winds through the woods. There is not any clearing involved. As a result, there is a lot of zig zagging and short uphills and downhills. All tree roots and rocks are left in place. 10 miles of road running is a piece of cake compared to 10 miles on a trail. However - the scenery is incredible on the trail.
There is a National Recreation area near me called Land Between the Lakes. It's not the most romantic name but that's basically what it is - a land mass between Lake Barkley and Kentucky Lake. They have many trails and I checked it out yesterday. There is an 11 mile trail loop that is typically used for mountain bikes. It's a 70 mile drive but it was well worth it. I left home around 6:30am and hit the trail around 8:00am. The goal in trail running is to not trip on a root or a rock and to not hit your head on a low branch. I was successful on all counts. yay