Were is st annes

Specifically, the bit of the park where the jumps etc are is at the junction of the Bull Island causeway (not the wooden bridge) and the coast road. From the junction, follow Watermill Road (the road that heads inland) for about 100 m and on the left is an entrance to the park. In through the entrance and in the trees to your left is the jump spot. Non-knobbly tyres or you may incur the wrath of the builders!