It’s hard to say how large it would be until I laid it out. I’m guessing the ravine might be 12″-18″ deep. The height of the ride would be similar. Perhaps about 6′-8′ long (wide) and only 3′ deep (front to back). The top part of the ride would have flat terrain as would the turn around area. The only terrain would be the valley. I’m guessing we would build a wooden “table” and then cover it with blocks rather than build it up from all bricks.