Running a marathon is a big enough challenge for most people, but now imagine you are running the Novant Health Charlotte Marathon with a visual impairment that doesn’t let you see the crowd, or bumps in the road, or other obstacles as clearly as the other runners. Para Guides exists for just that reason. Shannon Houlihan is a triathlete who wanted to help others, so she and another runner started the Para Guide Foundation to help visually impaired athletes.