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Requirement to certify your boat as mussel-free to participate in Mack Days
Recent discovery of invasive mussels in central Montana has elevated the need to reduce the risk of infestation in Flathead Lake. This is a very serious concern. Mack Days will not accept fish from boats that have not been inspected. You must provide proof of certification from an authorized inspector before your fish will be accepted in the contest (we will take entries but not fish).

2017 Fall Mack Days Boat Inspection
All boats are required to be AIS inspected by state or tribal inspection staff. If you are coming from out of state or cross the Continental Divide you are required to have a FWP boat inspection from one of the FWP stations. All boaters are required to stop at any inspection station they go by even if you already have been inspected. If you are from this area and do not have an inspection we can do it at Blue Bay if needed. Telephone 406-270-3386 to set up a time.

For the most up-to-date information visit: csktnomussels.org


We remind all anglers that your boat must be inspected if you are fishing from a boat. We will not accept fish from boat anglers who have not received an inspection from the Mack Days inspection sites or from a state inspection site before fishing that day.

We remind everyone that the Mack Days AIS Inspection does not replace the required state AIS boat inspection. Report any invasive mussel sightings to the National Hotline: 1-877-786-7267.