Solve for ABC where:
N 032° 47.179' W 116° 59.ABC'
Using the phone number on sign:
619-667-DEFG
A = E
B = G minus 4
C = D
Checksum A+B+C = 7
You’re looking for a bison tube out of sight with a “handle”.
Be safe and remember the name is Beware of Spiders