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