The cache is hidden in the Dougherty Wildlife area, just east of Marysville Road. Park at the coordinates listed below, and hike east on the red-dirt trail...after you solve the puzzle below. This is a difficult placement. You must be agile and sure-footed, or have a major TOTT with you. Do not go at night.
3192110319810820315039195018192391121202390570822391820812120394
CheckSum: N=35, W=20