The cache is not at the posted coordinates and you'll probably want to drive to the final.
The final puzzle has been moved about 1.5 miles because it was not allowed in the park.
When I first came out here visiting the park, this statue was covered with snow. It was a cold day and I started thinking of the young men and boys who rode through here in winter. No heater to keep them warm. No McDonalds for a quick snack. They kept riding mile after mile until they got to the layover where another young man or boy would grab the mail and continue on.
To find the final coordinates you'll need to complete the puzzle at this link.