The first week of the 2026 Spring Mack Days saw nearly 1,900 lake trout caught despite harsh winter conditions. The event supports fish conservation, enhancing native trout populations in Flathead Lake.

Mack Days returns to Flathead Lake March 12–May 9, 2026, giving anglers nine weeks to target non-native lake trout while supporting conservation of native bull trout and westslope cutthroat. Get the key dates, prize details, entry rules, fish drop-off locations, and important release and fish ID requirements.

Week 1 results are in for 2024 Spring Mack Days! It was a great first week, and from Thursday to […]