Montezuma Slough , one of the largest , is open at both ends .
Montezuma Slough 's flood tide current is longer and stronger Montezuma Slough 's its ebb tide current , causing a net west - to - east flow which draws higher saline water eastward from Grizzly Bay .
Montezuma Slough , one of the largest , is open at both ends , and its flood tide current is longer and stronger than its ebb tide current , causing a net west - to - east flow which draws higher saline water eastward from Grizzly Bay .