The navigable river Cam runs for 14.5 miles (23.2 kim), from Cambridge to the junction with the Great Ouse, at Pope's Corner. Upstream from Cambridge, the river is used by canoeists as far as Guilden Moor (Cam) and Audley End (river Granta). There are 3 locks.
There are a series of navigable man-made channels (lodes) feeding into the river:
Reach Lode (2.1 miles) and Wicken Lode (1.5 miles) feed into Burwell Lode (3.7 miles), which joins the Cam at Upware, about three miles upstream of Pope's Corner. These are open and maintained by the Environment Agency. Swaffham Bulbeck Lode (cut-off by an inoperable lock) is semi-navigable, and Bottisham Lode is currently unnavigable. These lodes are not maintained for navigation but, along with others, are proposed for restoration.
The maximum size of boat that can navigate throughout the river Cam is
length: 100' (30.5 metres)
beam: 14' (14.3 metres)
height: 9' (2.7 metres)
draught: 4' (1.2 metres)
From Silver Street, Cambridge, to Bottisham Lock:
Conservators of the River Cam
Baits Bite Lock, Fen Road, Milton, CAMBRIDGE, CB24 6AF
T: 01223 863785
From Bottisham Lock to the junction with the Great Ouse:
Aqua House, Goldhay Way, Orton Goldhay, PETERBOROUGH, PE2 5ZR
T: 01733 371811
Environment Agency website