I had one container left, and I figured I could leave it here, on the way up to the La Vida trail. Container is a 1/4 cup spice jar, covered in camo tape. Minimal natural camo helps hide it; please cover it back up when you're done. Also, be careful of the barbed wire nearby. You do not need to touch it to access the cache, but be mindful of its presence so that you don't accidentally walk into it.
You'll be walking through Chino Hills SP property at the start of your walk, so their operating hours apply. Currently the park website states October - March 8am-5pm and April - September 8am - 7pm; you can check the webpage yourself to see if there are any changes.
Congratulations to Lucky_Turtle for FTF!