Walkers pulled on their boots and sun hats for the 33rd annual Waendel Walk.
Visitors from across the world descended on Wellingborough to walk or cycle through the surrounding countryside.
Some travelled from the other side of the world to attend the event, which had routes from 5km to 42km. It opened on Friday and took place throughout the weekend.
Wellingborough Council’s events officer Julia Wells said more than 600 took part on Friday.
She said: “I think the weather has been a major factor – I’ve had a couple of sleepless nights over the past couple of weeks but we only had to divert a couple of the routes slightly. We are really pleased the event has been well attended – it has beaten my expectations.”
Cllr Peter Morrall, from the event’s working party, said: “The weather has been good – it’s Waendel weather.
“We are hoping a lot of money will be raised for charity over the weekend and we have a nice lot of people from overseas, even 17 Israelis have turned up. I always say you start on your own and by the time you have finished you’ve made a friend.
“The town benefits in so many ways commercially – it benefits as people stay in hotels, eat in restaurants and a lot of charities benefit from the sponsored walks. People’s fitness benefits with the walking and doing a bit of training beforehand.”
Among those taking part this year were Lynn Peck of Doddington Road, Wellingborough, with daughter Torie, 14, and her friend Hollie Ward, 15.
Mrs Peck said the group had raised £120 for Marie Curie.
She said: “We do the walk every year. This is the first time we have done it in fancy dress for charity as everyone knows someone suffering from cancer.”
Stefan Prestedge, 31, of Wollaston, has completed numerous walks over the years but, for the first time, was accompanied by his puppy Bonny.
He said: “It’s just a good day out and exercise as well.”