Welcome to the Polulating Purisima series. This is a series of 5 caches along the Grabtown Gulch, Borden Hatch Mill and Bald Knob trails. Note the Secret Letter at the top of the log on each cache for the bonus!
This cache is in a small "compartment" in the huge stump ~20 feet downhill from the trail.
Enjoy!
Evtug fvqr bs fghzc, ~5 srrg uvtu.