High up in the mist-shrouded hills of Richmondshire a chilly windy carries the sound of bagpipes across the tops.
It is the signal for 500 members of 4th Battalion the Royal Regiment of Scotland to set off on their annual cross-country run.
Known as the Charles Morpeth, the race is dedicated to a former Major, who was killed in a helicopter accident in Bosnia in 1997.
In boots, combat trousers and company t-shirts the runners tackle the demanding nine-mile course.
"It is really inspiring to see so many people out there."
Commanding Officer, Lt Col Neil Tomlin said: "You are targeting the next person. You are constantly trying to race against that next person to do the best for your company."
For the second year in a row, CSgt Scott Boyle crossed the finish line in first place.
The keen runner admits every year the event gets ever more challenging, but never felt any real pressure.
"I could see a couple of people in the distance behind me."
"They were having a good battle between a couple of platoon commanders, which was funny to see. But as far as I was concerned I was quite far in front."
At the end of the race, there was a chance to relax and refuel at Britain's highest pub, the Tan Hill Inn.