The Cycle Track and its Accessories

It's been a long time since I took the dogs to the nearby forest. Spencer is not too keen on the twigs that become entangled in his "undercarriage".
We more or less stumbled on this cycle track and followed it back to the car. It was late afternoon and we only met one couple out walking and not one cyclist.
I was intrigued by all the man-made as well as natural objects along the route. Why anyone in their right mind wants to cycle over such rough terrain, up and down impossible gradients and ride along narrow planks over water beats me. ....each to his own, I suppose.