A lightening-blazed tree. Loud.
To blaze a path on the Great Plains, one would twist some tall prairie grass and the top tufts would point the way. Rather temporary.
To the wooded east, trails were marked using trees. Some lasted 500 years or more. (Find the book—there are photos.)
Petroglyph of upside-down man in Western Colorado (Photo credit: Wikipedia)
In the Rockies? Rocks, maybe. Petroglyphs. Pictograms. Piles of rocks. Trees, also, I suppose, until a forest fire blazed them.
Forrest Fenn’s blaze? Wish I knew.
Morning Blaze Over Santa Fe
The Fenn Diagrams 
In that case one blaze leads to another and another and ….
Bunsen Peak
That was one of my first ideas. Good luck!