2025 SPRING MACK DAYS MARCH 13 - MAY 10 Flathead Lake UP TO $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 ranging from $100-$500. SPONSORED BY RATED SALIS KOOTENAI TRIBE SANCTIONED MONTANA BY SH, WILDLIFE & PARKS Catch the $1,000 Fish! Sponsored by Bretz RV & Marine OF THE RESERVATION FLATHEAD A People of Vision For Rules, Prizes, Check-in Sites or to Register, go to: www.mackdays.com or call 675-2700 EXT. 7294 2025 SPRING MACK DAYS MARCH 13 - MAY 10 Flathead Lake UP TO $ 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 ranging from $ 100- $ 500 . SPONSORED BY RATED SALIS KOOTENAI TRIBE SANCTIONED MONTANA BY SH , WILDLIFE & PARKS Catch the $ 1,000 Fish ! Sponsored by Bretz RV & Marine OF THE RESERVATION FLATHEAD A People of Vision For Rules , Prizes , Check - in Sites or to Register , go to : www.mackdays.com or call 675-2700 EXT . 7294