Get the info off the informational sign at the posted coordinates to get the final coordinates.
The final cache is hidden at N 33 20.ABC W 97 11.XYZ.
A = Last digit in the length of the Pond Loop
B = First digit after the area code in the phone number at the bottom of the sign
C = Number of letters in fifth word of second bullet point under "park rules"
X = Second digit in the time the park closes
Y = Number of colored trail loops
Z = First digit of the phone number at the bottom of the sign