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