The Western States 100-Mile Endurance Run is world-renowned for its difficulty. With 18,000 feet of elevation gain and drastic temperature changes, the race has broken even the most accomplished ultra-runners. Past entrants throughout the race’s 45-year history have included runners of all ages and physical abilities. But Kyle Robidoux, an ultra-runner from Roxbury, Massachusetts, will be a trailblazer when he toes the race’s start line this June as the first visually impaired runner to attempt the grueling course. Robidoux has retinitis pigmentosa, which results in what he describes as “extreme tunnel vision.” It hasn’t stopped him from challenging himself on the roads or trails; he lost 70 pounds after taking up running in 2010 and has completed three 100-mile races since. Click here to read the full story from Runners World.