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