Volunteers in Lichfield and Burntwood are being urged to support the Ironman Staffordshire race.
The event takes place on 9th June and sees thousands of competitors swim at Chasewater before cycling and running to a finish in Stafford.
Volunteers are needed to help out with marshalling courses and assisting in the swim transition area.
There are already 500 people supporting the event, including stewards, medical staff and technical officials.
Cllr Mark Winnington, Cabinet member for economic growth at Staffordshire County Council, said: “Volunteers really are part of the fabric of Ironman, with hundreds of people giving up their time freely to help out, whether it’s handing out water to athletes, helping them out over the finish line, or making sure the race goes smoothly.
“The race itself may be sold out, but there are still plenty of volunteer spots available so I would recommend anyone who still wants to be part of a fantastic day to sign up and help out.”