Its outside of minneapolis,Minnesota in the end of summer/fall season.
If you have never gone it is worth the trip even from utah. took half a day last year just to walk 4 rows at the swap meet area. if you want to find deals on sled stuff this is the event to attend.
Just got an e-mail from Sno-barons stating I won a pair of free VIP tickets to haydays this year for completing a survey on what I thought of it the other year. Just had to give my address and they'll mail them out. Sweet!