Step 1
Park at N39° 57.119' , W105° 00.948'
At the entrance information station 100' away, there is a telephone number located on a poster in the lower right-hand corner of the board. Assign letters to the telephone number in the form "ABC-DEF-GHIJ."
Also, before leaving, look to the north across the lake.
"K" is twice the number of large white rectangles painted on the south side of the red barn.
Step 2
Proceed to N C9° 5F.B51', W 1J5° HI.GCJ'
If your decoding is accurate, you'll be able to get a handle on things from here.
"L" is the number of spokes.
Step 3
Proceed to N C9° 5F.1LB', W 1H5° BJ.LGF'
"M" is one-third of the number of rails intersecting the corner post.
Step 4
Proceed to N C9° 5F.MJ1', W 1H5° BJ.KDL'
The key to this step is finding 3 numbers at this location that add to 5. Assign the numbers you find to the letters "X," "Y," and "Z," in that order. If you're correct, you'll find that "Y" is largest number.
Step 5
And now, on to the cache!
Proceed to the cache at N C9° 5F.YMZ', W 1B5° JH.DXF'.
Hopefully, this cache site is above the flood plain. Please hide it when you're done for the next cachester and congratulations!