Would the person or persons who last week (approx. 11th Sept.) seen doing track ? maintenance on riding trails leading out of St. Ives showground please consider what they are doing e.g.digging trenches across the trails to drain water in approx. 25 locations, laying sticks and branches across muddy sections dist.approx. 5 metres. I am under the impression riding a mountain bike is in the challenge of riding natural terrain.