Alton Water Park - "Located within the stunning countryside of Suffolk, Alton Water Park stretches across some 400 acres and is the perfect place to while away an hour or a whole day" "The main track around the water (eight miles) is used by both pedestrians and cyclists and is hilly in places. During wet weather this track can become muddy. There are two other routes both of which use country lanes and are clearly sign-posted. The track north of Lemons Hill Bridge is not open to cyclists" 

also see the Easy Going Trails leaflet from the Discover Suffolk website