Hiking near Galt, California

This is a 7 mile round trip loop trail.  It begins at parking area 12 (the north dam parking lot of the Rancho Seco Recreational Area).  When you enter the park from CA-104/Twin Cities Road you'll drive very near by the cooling towers of the decommissioned Rancho Seco nuclear plant.  Then you'll turn left and there will be a pay station.  Our book said it would be $5, but it was $10....