The Posted Order with map of the closure area can be found here. East Natoma St. Folsom Lake Crossing. S o p h ia. . Folsom Lake. D r. If you took any photos please post them in the comments. folsom lake trails map. Green Valley Rd. Main Body. There is no trail access or alternate route within Folsom Lake State Recreation Area. P a rk w a y. State Recreation Area. Success at our Poker Ride! Thank you to everyone who attended. F ra n c is c o. Trail Map.