The cache isn't at the given coordinates although it wouldn't surprise us if someone placed one there sometime.
To determine the cache coords, you must solve this Figure Logic puzzle. For basic instructions, see GC4EQFG.
Pinnacle State Park permit number 01-13, expiration date: 8-18-15
Certitude will confirm your correct coords and also provide coords for parking and a trailhead. Enjoy.
You can validate your puzzle solution with certitude.
CONGRATULATIONS: To TopNerd for FTS and his first ever FTF. Well done!