2025 SPRING MACK DAYS MARCH 13 - MAY 10 on Flathead Lake For Rules, Prizes, Check-in Sites or to Register, go to: www.mackdays.com or call 675-2700 EXT. 7294 UP $225 $225,000 IN CASH + PRIZES Sponsored by the Confederated Salish and Kootenai Tribes (1) Tagged $10,000 fish; (3) $5,000; (5) $1,000; plus over (9,000) tagged Lake Trout SANCTIONED BY WILDLIFE E&PARK ranging from $100 Catch the $1,000 Fish! Sponsored by Bretz RV & Marine EDERATED SALISH AND OF THE FLATHEA BY KOOTENALT RESERVATION A People of Vision $500. 213316 2025 SPRING MACK DAYS MARCH 13 - MAY 10 on Flathead Lake For Rules , Prizes , Check - in Sites or to Register , go to : www.mackdays.com or call 675-2700 EXT . 7294 UP $ 225 $ 225,000 IN CASH + PRIZES Sponsored by the Confederated Salish and Kootenai Tribes ( 1 ) Tagged $ 10,000 fish ; ( 3 ) $ 5,000 ; ( 5 ) $ 1,000 ; plus over ( 9,000 ) tagged Lake Trout SANCTIONED BY WILDLIFE E & PARK ranging from $ 100 Catch the $ 1,000 Fish ! Sponsored by Bretz RV & Marine EDERATED SALISH AND OF THE FLATHEA BY KOOTENALT RESERVATION A People of Vision $ 500 . 213316