Aquatic Invasive Species & Recreation Impacts

Aquatic invasive species (AIS) can reproduce quickly and spread rapidly. AIS—such as zebra and quagga mussels, Eurasian watermilfoil, and flowering rush—can displace native species, clog waterways, impact irrigation and hydropower systems, degrade ecosystems, threaten recreational opportunities, and cause wildlife and public health problems. While recreating on Montana Waters, it’s important to understand and lessen your impacts on waterbodies. Learn how you can be a responsible recreator and stop the spread of AIS!

Recreate Responsibly


Ensure your watercraft and gear are cleaned, drained, and dried and stop at all open watercraft inspection stations when recreating on Montana Waters. AIS can travel from waterbody to waterbody on your watercraft, waders, and gear. It’s important to ensure any items you plan to bring into the water are clean and free of AIS.


Reduce boat wakes when wake surfing, wake boarding, and engaging in other water sports by observing no wake zones and keeping your wake to a minimum within 500 feet from the shoreline. Wake boats generate a large surfing wave that hits the shoreline with immense energy. Increased shoreline erosion because of this recreation has caused shoreline erosion for landowners who are losing large portions of their property and experiencing reduced water clarity and safety.


Prevent oil and gas spills by using absorbent fuel bibs when refueling your watercraft and other gas-powered vehicles.

To learn more about AIS and to report any suspected AIS sightings, visit the Montana Fish, Wildlife and Parks website! We need your help to prevent AIS in Montana!

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