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