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