This is an update to a missing man story originally discussed on the BFF post below (which has been closed for further comments).
http://bigfootforums.com/topic/51796-eerie-story-of-missing-man/?page=2
The missing man's body was found.
Outside magazine had a great article last year (March 13, 2017) on missing persons titled "How 1,600 People Went Missing from Our Public Lands Without a Trace".
In this article the author covers the disappearance of Joe Keller on July 23, 2015 while jogging in Rio Grande National Forest in southwestern Colorado and the eventual discovery of his body on July 6, 2016.
https://www.outsideonline.com/2164446/leave-no-trace
The article goes in depth on the Search and Rescue efforts that were conducted and the lack of success in finding his body.
In reading the older BFF comments from 2015, it looks like one of Airdale's hypotheses for the missing man demise was correct - he fell off the cliffs north of the Rainbow Trout Ranch.