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