" Hints to the treasure's location (and even a map depicting New Mexico, Colorado, Wyoming, and Montana) are included in two of Fenn's books, "The Thrill of the Chase" and "Too Far to Walk." A poem by Fenn that advises the reader to "begin it where warm waters halt" is said to include nine clues.
"Read the clues in my poem over and over and study maps of the Rocky Mountains," Fenn said via email. "Try to marry the two. The treasure is out there waiting for the person who can make all the lines cross in the right spot."
The best place to hide something is in plain sight.
In an interview he mentioned "when you are close, you can see it".
An 80 year old man parked and hid his treasure and got back to his car in under 4 hours time.
That he carried the treasure in his arms was said by him in an interview, Gold is heavy, how far could an 80 year old carry that much weight?
"There's a fortune hidden somewhere in the Rocky Mountains." This statement (headline from Business Insider) and pretty much everything else in this thread that's stated as fact about this fun treasure hunt (except that the gold is not known to have been found) all traces back to a single source: Forrest Fenn and his various statements and writings.
It's fun, yes, but it could as easily be fiction as fact. More easily, in a literal sense; it would have been easier to get to where we are in the story today if the treasure never existed and Fenn were merely a convincing fabulist.
In order to have fun actually chasing this treasure, a person would have to do the "faith" thing, putting trust in an eccentric old man and believing that he's not laughing in his beard at the people stumbling through the mountains looking for something that might or might not ever have existed.