This largely traffic free route runs along National Cycle Network Route 33 from Bristol to Nailsea.
You start off in the centre of Bristol and soon pick up a lovely riverside path along the River Avon. Soon after you enter the splendid Ashton Court Park where you will find 850 acres of woodland, grassland and deer park. The route is so named because of the use of the Ashton Court Estate for various festivals such as a Kite Festival and a Balloon Festival. In the park there are two very good mountain bike trails. There is a blue (moderate) grade route with small rock steps, rollers (bumps) and berms (banked corners). There's also a more difficult red graded route for experienced mountain bikers.
After leaving the park you continue you through the village of Long Ashton before heading into Nailsea on Blackwell Bow.
The pretty Tyntesfield House is not far from this final section of the route and worth a short detour if you have time.