Tourists pose for a picture on Loveland Pass, Colorado, as the Continental Divide looms in the background on Saturday, June 13, 2015.

(Hart Van Denburg/CPR News)

"Through hiking" the entire Continental Divide Trail from Canada to Mexico means covering 3,100 miles -- a chunk of it in Colorado. And it's not just the towering mountains, dry deserts and extreme weather that make the trail challenging. Hiker and "The Trail Showpodcaster Felicia Hermosillo of Salida tells Colorado Matters that sometimes the trail just disappears. That's why she’s now part of a group trying to blaze, or mark, the entire CDT.