I'm celebrating my 16th cache-a-versary by hiding a compilation challenge cache (CCC) about something dear to my heart, Yolo County unknowns! The difficulty is because of the many puzzles you'll have to solve (or otherwise acquire the answers to) to qualify for the challenge! Actual difficulty of the hide is 2.5.
The final container is at the posted coordinates and you can sign it any time, but to log it as found online, you also need to complete this challenge: It doesn't matter what date your finds were hidden, what date you found them, size, terrain, nor what difficulty. As long as you have 100 unknown finds in Yolo County, you have qualified and can log this as found after signing.
But first, here is a checker to see whether you pass the challenge:
