The Wandle Trail is a Sustrans route reaching from the Croydon to the Thames. Cycling this trail makes a good day out and it is mostly off road. You cycle through up to 12 parks including Ravensbury Park, Morden Hall Park, Wandle Meadow Nature Park and Beddington Park. You can stop at the Merton Abbey Mills market and Deen City Farm, not to mention all the nice pubs and cafes on the way. See the Wandle Trail website for more information.