2025 SPRING MACK DAYS MARCH 13 - MAY 10 On Flathead Lake UP TO $225,000 IN CASH + PRIZES For Rules, Prizes, Check-in Sites or to Register, go to: www.mackdays.com or call 675-2700 EXT. 7294 SANCTIONED MONTANA FISH WILDLIFE BY & PARKS Catch the $10,000 Fish named Willy! Sponsored by Bretz RV & Marine SPONSORED ET BY NO KOOTENAI TRIBE RESERVATION OF THE FLA FLATHEAD A People of Vision Sponsored by the Confederated Salish and Kootenai Tribes 215145 2025 SPRING MACK DAYS MARCH 13 - MAY 10 On Flathead Lake UP TO $ 225,000 IN CASH + PRIZES For Rules , Prizes , Check - in Sites or to Register , go to : www.mackdays.com or call 675-2700 EXT . 7294 SANCTIONED MONTANA FISH WILDLIFE BY & PARKS Catch the $ 10,000 Fish named Willy ! Sponsored by Bretz RV & Marine SPONSORED ET BY NO KOOTENAI TRIBE RESERVATION OF THE FLA FLATHEAD A People of Vision Sponsored by the Confederated Salish and Kootenai Tribes 215145