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