Are you looking for "contests" or tournament.
Heres the ones I know off- Dates are not exact.
Maple Lake- Jan 31 st----- This is a can't miss. Show up VERY<VERY Early.
Lake Francis- the Sat a week before the closing of the season.
Lake Francis- The day before the closing of the season.
My neighbor and I will be again putting one on somewhere, date and lake are yet to be determined.(possibly the last day of the season).
I can put a few small one's together if I get some interested.
Howard Lake- I will find out the day and time of that, but it is usually the same day of one the Lake Francis Contest.