CALLING all runners. The Purbeck Trail Series starts on August 20 with the Lulworth Castle 10k, and culminates on October 15 with the Studland Stampede.

Being a partnership of six races, the Purbeck Trail Series provides challenging opportunities for runners of all standards.

There are no additional costs beyond the races' standard entry fees. Runners completing any of the races will automatically score points for the Purbeck Trail Series.

For individuals, your four best results count, so the more races you enter the greater your chance of winning one of the 17 trophies on offer.

There will also be a club/team prize for the highest scoring mixed team of two men and two women.

It doesn't have to be the same runners in every race; the best two of both genders for each club/team in each race will count, with all six races counting towards the club/team score.

For details of how to enter these races and how to get your own Trail Series Technical Tee Shirt, visit purbecktrailseries.wixsite.com/purbecktrailseries