High river flows have restricted boaters from many areas of the San Joaquin Delta. The large snowpack and runoff that is to follow this spring could keep South and Central Delta sloughs and channels closed to boats until late spring or early summer. The San Joaquin Office of Emergency Services (OES) continues to keep the San Joaquin River closed below Stockton, affecting Discovery Bay in the west with speed restrictions. The entire South Delta is basically shut down to recreational boating.