Hundreds saddle up for the Big Bike RideMore than 600 cyclists set off from Jesus Green for the event to raise money for the Arthur Rank Hospice Charity, East Anglia's Children's Hospices (Each), and Press Relief (the Cambridge News' community fund).
The ride was organised in partnership with Cambridgeshire County Council.
Keith Turner, 40, from Melbourn, was the first cyclist to register on the day after 600 had pre-booked.
He said: "I like a challenge and it's the longest I've ever cycled. I have been in training. I may be the first to register but will probably be the last to finish."
Jonathan Headland, 45, of Histon, saddled up sporting Austrian colours.
He said: "My wife's Austrian so hence the kit. I have been training by eating lots of cake and having lots of rest - as well as being out on the bike."
Roy Townsend, 80, who owns Townsends Light Blue cycle store in Chesterton Road, had a stall at the event and donated two top class bikes for the raffle as well as free gifts for riders including puncture kits and drinks bottles.
He said: "Having more than 600 registering is a great turnout. It is a fantastic event and a big thanks to everyone taking part."
Cambridge's mayor, Cllr Sheila Stuart, was there to see off the riders, and to get on her bike for the big cycle.
She said: "I'm doing the short journey. It's great to see so many people taking part."
Penny Potter, events and charity fundraiser for the News, said: "It's a first for Cambridge, and has been a wonderful day for all involved."
The Big Bike Ride followed two routes - the silver route, which took riders on a 20.12 km (12.5 mile) circuit of the city, and the gold route, which covered 201.2 kilometres (125 miles), taking in St Ives, Huntingdon, St Neots and Stilton.
Check out some pictures from the day on the Cambridge News' site, from the link below.