Cycle the Blackwater Valley from Swan Lake near Sandhurst. This hidden valley follows the Blackwater river through woodland and flower-rich meadows linking up this once-forgotten corner of Hampshire, Berkshire and Surrey. The path is mostly flat, has many sections that are easy to use and is becoming increasingly popular with walkers and cyclists. It follows an easy 7.8 miles, fairly flat route as far as Aldershot where you can return by on your bike or by train.