California Woods Nature Preserve is located at 5400 Kellogg Avenue, 45228.  There are 113 acres of forest featuring 53 tree species and 200 species of herbacious plants.  Lick Run Creek flows through the middle of the preserve.  Kingfishers, snapping turtles, small fish, mallards, wood ducks and beavers have been spotted there.  No dogs are allowed.
Parking is limited so please carpool.  There is a $5 fee per person.  Reservations can be made through the Cincinnati Parks website.