The race is thought to date back to the 17th Century
Competitors will be struggling up a steep hill with sacks of wool on their back in Gloucestershire later.
The Tetbury Woolsack Races are a trial of endurance as participants carry a sack of wool up and down the steep Gumstool hill in the town.
The race is thought to date back to the 17th Century.
The hill in the town is thought to have got its name from the ducking stool or "gumstool" used in medieval times to punish "gummy" or verbose people.
In the 17th Century the town was a major centre of the wool trade.