Trailhead, as with most caches in this area, at the top of Lilac Lane in Brea-Olinda, going through the north section of Chino Hills State Park, but there might be other ways to get there. The round-trip trail distance is just a about 2 miles, with 500 feet one-way net climb / descent, but you will want to hunt some of the nearby caches also. This area was once called "cache deprived" (by me!), but I now hereby declare that is is now "well cache endowed". Thanks, fellow cache planters! As of this time, there are at least 10 nice caches with a meaningful 5 mile or so hike.
So three of us "oldsters" were out for a hike, and - OK, looking for a few caches (actually finals from some puzzle caches). Watched distances carefully, and found a few spots that needed a cache.
Simple cache to find. Should be obvious; the hike is the reason, not the hide.