Yesterday I took a walk on the Calero Creek Trail connector to get to Santa Teresa Park's Stile Ranch entrance. Most users of this trail are on bikes, and it's flat, so that would have been an option if I ever get around to fixing my flat tires. I found a segment of trail that appeared to be cache-free despite the best efforts of some of our prolific cache hiders who have many others in the area, so once I found a suitable spot I decided it would work great for a cache.
You are looking for a small rectangular lock-n-lock style camo taped container. Happy caching.