After abandoning one piece at Julia Pfeiffer State Park, I pushed myself too hard on a trail and sprained my ankle. The other two pieces therefor are not on trails as per usual.
#7, "S-In." McWay Falls viewing platform, Julia Pfeiffer State Park.
#11, "Chose." Campground 83, Pfeiffer Big Sur State Park.
#23, "Washes." Rest stop directly north of Laytonville, Ca. on Highway 1.