The blind hiker who scales mountains
Trevor Thomas has hiked more than 6,000 miles of America's most treacherous back country trails and mountain paths. An amazing feat for anybody - but all the more extraordinary because Trevor is blind and relies on his guide dog, Tennille, to help him. Trevor told Jo Fidgen just how hard it is to set off on a hike when you can't see what's in front of you.
(Image: Trevor Thomas and his guide dog, Tennille. Image credit: Trevor Thomas)