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