- 2023 - FALL MACK DAYS SEPT Nov 12 Flathead Lake UP $200,000 TO IN CASH + PRIZES (1) $10,000 & (3) $5,000 & (5) $1000 awards plus over (9,000) $500 to $100 Tagged Lake Trout. VED SALIN AND For Rules, Prizes, Check-in Sites or to Register, go to: www.mackdays.com or call 675-2700 EXT. 7294 FISH, WIL NOOTINAL THE THE FLATHEAD RESERVATION A People of Vision Catch the $10,000 Fish! Sponsored by CS&KT EN MONTANA WILDLIFE BY SANCTIONED BY 147335 - 2023 - FALL MACK DAYS SEPT Nov 12 Flathead Lake UP $ 200,000 TO IN CASH + PRIZES ( 1 ) $ 10,000 & ( 3 ) $ 5,000 & ( 5 ) $ 1000 awards plus over ( 9,000 ) $ 500 to $ 100 Tagged Lake Trout . VED SALIN AND For Rules , Prizes , Check - in Sites or to Register , go to : www.mackdays.com or call 675-2700 EXT . 7294 FISH , WIL NOOTINAL THE THE FLATHEAD RESERVATION A People of Vision Catch the $ 10,000 Fish ! Sponsored by CS & KT EN MONTANA WILDLIFE BY SANCTIONED BY 147335