All the single track in horsetooth Mopuntain Park is challenging to descend and near impossible to climb. The young thin rider can climb Tower road to get to all these descents but that is impossible for a heavier or older riders. On this ride I got to the upper part of Tower road by climbing 38E from Blue sky parking to the upper entrance then taking south ridge , Horsetooth Rock, and Soderburg trails then a left to climb Spring Creek trail. About 0.4 miles past Wathen I turned right on a short unmarked trail that cuts back to Tower road. From here you can go down hill to descend Herrington or climb Towers to descend Carey Springs trail (my Favorite) or Mill Creek (this ride) or upper spring creek, or Continue on westridge to descend Wathen. This way to the upper part of Tower road has about 0.3 mile of hike a bike after the left turn onto Spring creek trail but the rest can be ridden.