All that sap ran with the coming of the above freezing weather. Lake Lucerne is still frozen, but it's usually one of the last lakes to open up. Lake Wabikon typically has its ice-out a week or two before Lucerne's. Wabikon, Riley, and Devils Lake are still frozen. An April ice-out on Lucerne is becoming very unlikely.
Given the solid nature of the surface of Wabikon, et al., it's implied that Metonga is also ice covered, but for the record we'll state it outright. Lake Metonga is also ice-covered.