There is currently a protected slot of 24-36 inches, with one fish allowed over 36". All northerns of 24-36" in length must be immediately returned to the lake. Bag limit is 3 fish.
The largest northern released by a guest in 2013 was a 42.25" fish caught by Tyler Stepke the week of July 20.
For a full report, click here: Summary of the Fish Population For Lake Vermilion