Eighty-one-year-old Mike Doyle served in the RAF Regiment and has become a regular fixture at the annual event. He competed with a full 35lb pack and said his secret to success is to focus his mind as the body is capable of doing extraordinary things.
"Don't look too far ahead, just look about 10 or 20 feet in front. Otherwise you could get disheartened, because it's pretty rough terrain."
Stephen Cooper, director of a charity benefitting from the event, said: "We call it the ultimate endurance race, it is tough.
"This is what the Paras do to become Paras."
The organisers say the main aim of PARAS' 10 is to raises funds for the charity 'SUPPORT OUR PARAS' whilst providing a challenging and enjoyable event.