Natural Bourne Runners organise a 24-hour virtual event to raise funds for two charities.
More than 250 runners set out on a course of either 10kms of 13.1 miles across mainly flat terrain.
Fourteen athletes from across the country went the distance at Bourne Leisure Centre.
About 32 runners tackled a course in reverse to coincide with February 29 being an extra day in the calendar.
Two youngsters from Peterborough and Nene Valley Athletics Club claimed podium places in Sheffield.
The latest round of competition in the Geoff Capes-run Lincs Throws Academy event took place on Sunday.
Double success for Bourne Academy student in the Eastern Young Athletes League at Ware
Runners were out in force at the weekend for round three of the season’s Virtual Frostbite League.