Blindness didn't stop one New Hampshire man from taking on the Tough Mudder last week, where he was one of only 10 percent of competitors to successfully ring a bell while swinging on a rope 25 feet in the air. Randy Pierce, from Nashua, may now gearing up to run the Boston Marathon this month, but there was once a time he couldn't walk at all. Pierce lost his sight when he was just 22 years old, from a neurological disease that also left him in a wheelchair. Randy Pierce, pictured at the Boston 5K with his late dog Quinn, was one of only 10 percent of competitors to successfully complete the Tough Mudder's 'King of the Swingers' obstacle in California last week . Pierce had to jump off a ledge and grab a piece of rope that he needed to swing to a bell 25 feet above the air, before falling into a pit of muddy water . And although he was 'frustrated and angry' at first, Pierce was soon  training himself to walk again. 'I love turning obstacles into opportunity,' he told My Fox Boston. 'How much do you have to rebound from, how much do you have to climb up from? The the answer is, however much is there to be climbed.' Pierce left his wheelchair for good in 2006 and was soon climbing plenty - all 48 mountains in New Hampshire, to be exact. And he was running again too, participating in 30 road races with his guide dog Quinn. 'When you can't walk, you learn what a gift it is to celebrate walking, climbing, running, whatever it is,' he said. And Pierce is now a viral star after his incredible performance at a Tough Mudder competition in California last week, where a video captured him completing the 'King of the Swingers' obstacle. Pierce left his wheelchair for good in 2006. He has since climbed all 48 mountains in New Hampshire, as well as run 30 road races, with his guide dog Quinn . Pierce decided to run the 2015 Boston Marathon in honor of Quinn after the dog passed away from bone cancer last year . The challenge, just one of many in the team-oriented 10-12 mile obstacle course, required Pierce to jump off a ledge and grab on to a rope, according to the Tough Mudder's website. As Pierce swung through the air, he successfully hit the bell each participant must try and ring, before falling 25 feet into a pit of muddy water. 'My fingers just grazed the bell but it started ringing and tipping and the crowd went crazy,' he told My Fox Boston. Now Pierce is hoping to hear he will hear the crowd cheer at the end of the Boston Marathon finish line, a race he is running in memory of Quinn, who passed away from bone cancer last year. It was Quinn who helped Pierce cross the finish line at Boston's shorter 5K run just a day before the bombings in 2013. And it is Quinn who will be on Pierce's mind as he runs the April 20 race. 'I'm going to savor all these people running with me, all these people lining the streets,' he told WMUR 9. 'And I'm going to savor one really mighty guide dog.' Pierce has run three marathons just this year in preparation for the Boston Marathon on April 20 .
Randy Pierce was one of only 10 percent of competitors to successfully leap off a ledge, grab onto a rope and ring a bell while 25 feet in the air.
Pierce lost his sight at 22 from a neurological disease.
He left his wheelchair for good in 2006 and has been running and climbing ever since.
Hiked all 48 mountains in New Hampshire with his guide dog Quinn.
Will run in memory of Quinn, who passed away last year from cancer.