Advance registration is now available for the 35th International Waendel Walk, which takes place in Wellingborough over the weekend of 9-11 May.
The event attracts thousands of walkers from all over the world, and anyone wanting to book their place in advance has until Thursday 8 May to register.
The Waendel Walk, the only event of its kind in the UK , kicks off this year on the evening of Friday 9 May with the two friendship walks of 5km and 10km. They are followed by a weekend of different routes throughout the borough ranging from 5km up to a marathon-distance 42km.
Cllr Peter Morrall, chairman of Wellingborough Council's community committee, said: "I've been involved in the Waendel Walk for more than 30 years now, and over that time I've seen it grow hugely in popularity and size. What we now have is a truly international event, attended by four or five thousand walkers from every corner of the globe, including as far away as China and Japan , as well lots of people from much closer to home.
"We're always told how much everyone enjoys taking part in the walks, not only because they're safe and very professionally organised, but also because of the stunning countryside that so many of them pass through. Even people from right here in Wellingborough are often amazed to be exploring the beautiful scenery we have right here on our doorstep.
"The Waendel Walk also has such a positive effect on our local economy, with hotels, guest houses and shops all getting a big boost in trade. It's a perfect opportunity to showcase to people all over the world what our borough has to offer."
Pre-booking to take part in the Waendel Walk is cheaper and avoids queuing on the day. It is available at The Castle's website - www.thecastle.org.uk/waendel - until Thursday 8 May, after which people will have to register in the main hall of The Castle.