BBC Cambridgeshire will be live at the Great Eastern Run
More than 5,000 runners from around Peterborough and beyond are in training for the Perkins Great Eastern Run 2011.
As well as local fund-raisers, the organisers hope the half marathon will attract even more international athletes than last year.
Kenyan Edwin Kipyego was 2010's winner, in 62 minutes and 16 seconds.
Not able to make it? Well, BBC Radio Cambridgeshire will be broadcasting live from the event on Sunday 9 October.
Peterborough breakfast presenter Paul Stainton said: "The run gets bigger every year and it brings the whole of Peterborough together, on the streets.
"I can't wait for the big day, and look forward to getting everybody warmed up in Cathedral Square."
Tortoise or hare?
The race starts close to the city's medieval cathedral, and traces a route through the streets to the finish line on the Embankment alongside the River Nene.
Hundreds of residents and supporters are expected to line the streets to cheer on the athletes.
Runners have the choice of a 13.5 mile (21.7km) run for the serious athletes, or a 2.5 mile (4km) fun run.
BBC Radio Cambridgeshire's roving reporter and BBC Introducing presenter Kerry Devine is taking part for the second year running.
She said: "I'm a tortoise not a hare. I hope to beat my time of just over three hours. Yes it was slow, so slow in fact, people were walking past me, but I aim to complete not compete!"
Faith and ethics presenter Suzie Roberts plans to present her Sunday morning show as usual between 06:00 and 09:00 BST, then don her running shoes to take part in the fun run - alongside her mum, who will come up from her home in Plymouth to join her.
The fun runners set off at 10:00 BST, the half-marathon runners at 10:30 BST.
Peterborough city centre is closed until 14:00 BST so BBC Radio Cambridgeshire will bring you special travel bulletins throughout the morning.
Meanwhile, Sunday morning presenter Mark Rumble, and reporter Sophie Sulehria, will bring all the action to life as they broadcast from Cathedral Square and along the route from 09:00 to 12:00 BST.
Mark said: "It's going be a great day, me in Lycra and Sophie in trainers!"
Pop along and support the intrepid runners or listen to the action on BBC Radio Cambridgeshire on Sunday 9 October on 96 and 95.7FM, DAB or online.