Before even going out on a hike in the Calero County Park, you can nab a quick cache in the back of the parking lot.
Park in the lot and head towards the back. Don't need to go into the restricted area to find it. Cache is a large spice type container with lots of room for trackables and other fun things. Be wary of snakes near the cache, look before you step and where you reach your hand. Should be a pretty easy find.