The cache is NOT at the posted coordinates.
The posted and final coordinates are near one of the stops of the "Heart of the Delta" Adventure Lab.
At all ten Adventure Lab locations, you will see a bonus hint (i.e. X = 7) after correctly answering the question. This will help you solve for the final coordinates (N 038° AB.CDE, W 121° FG.HJK) for this cache. You can check your solution on the geocaching cache page.
We are honored to be working with local businesses to bring you this expanded Adventure Lab. The route runs between Rio Vista and Walnut Grove and highlights some of our favorite places. Every stop has it’s own video that we hope you will enjoy. Ken, working with his voice activated tablet spent over 100 hours creating them.
We hope you enjoy the Adventure Lab, and our Delta!
For more highly favorited caches in the Delta, check out this bookmark list: Caching The Delta Favorites
For more of our favorite caches that we have created and placed in California, Nevada, Washington, and Hawaii, check out this bookmark list: JoyfulNomad's Favorite Owned Geocaches