This is a two-stage multi. Go to the posted coordinates. There, you will find a wall with a 10-digit telephone number. Substituting the numbers for letters, that number is ABC-DEB-DBFG. The final coordinates are at:
N 32 38.uvw
W 114 23.xyz
Where:
u=D+E
v=D
w=A
x=B+D
y=E
z=C
Checksum:
North digits =19
West digits = 17
A 4WD or brief walk is required to access the final location of the cache.