"We've had so many things go against us. We had beautiful weather but bad weather before and bad terrain and injuries and stuff," he said.
"The 12 wounded soldiers have made it. They couldn't have made it without everyone's help, especially back home, the founders Ed and Simon as well."
Ed Parker, the expedition's director and co-founder of the charity that organised the challenge, said, "We always knew that this wasn't going to be easy, but that is what makes the challenge so exciting."
Harry and his Team Glenfiddich comrades completed the 208-mile races pulling pulks weighing 80 to 90 kilos across treacherous terrain. Temperatures as low as -45C were forecasted for their trip.