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