The "Wall" section of trail along Beggar Bush Lane was closed by Ashton Court Estate in Summer 2005 due to concerns over environmental damage and safety.

The area that was closed is a Site of Special Scientific Interest (SSSI) which the Estate are legally obliged to protect, and it was noted that the mountain bike trail was causing damage to the roots of large mature beech trees. In addition the Estate are not allowed to prune the trees that grow there as they form a habitat for endangered insects.

Many of the trees in this section are in a dangerous condition, and the Estate wanted to discourage riders from using the trail in case one was injured by a falling tree. This isn't just rhetoric - a lot of the trees there are in a very unstable condition.