06/11/2026
Friends and Colleagues,
Boating season is here in Montana with partners and FWP staff seeing high numbers of boats at inspection stations across the state. Inspection numbers state-wide are a bit behind last year (25,100 this year compared to 27,700 in 2025), but Memorial Day weekend saw more traffic than last year with over 4,100 watercraft inspected compared to 3,700 in 2025. The holiday weekend was BUSY with the Clearwater Junction station (operated by Missoula County) inspecting more than 1,000 boats over the long weekend.
The lab is also up and running and actively processing AIS early detection samples. No evidence of invasives mussels detected by the lab so far this season, but they do see other interesting things like native Staurastrum spp. Algae (photo attached)
AIS Update: May 2026:
Prevention / Watercraft Inspection:
➡️17 roadside watercraft inspection stations are in operation in Montana.
➡️Over 25,000 watercraft have been inspected so far this season.
➡️➡️➡️12 Mussel Fouled Watercraft have been intercepted to date. Mussel fouled boat intercepts are down also from this time in previous years (17 in 2025, 17 in 2024, 25 in 2023, 25 in 2022)
➡️2026 station location and dates of operation can be found here: https://fwp.mt.gov/conservation/aquatic-invasive-species/watercraft-inspection-stations
➡️Inspection data from the 2026 season is posted on the Watercraft Inspection Dashboard (updated weekly): https://experience.arcgis.com/experience/e7e5c01c253741bb88af3a963940c92d
Early Detection:
➡️AIS Early detection staff are conducting surveys state-wide. No new AIS detections so far this season.
➡️Over 100 AIS early detection samples have been processed so far this season with NO evidence of invasive mussels detected.
➡️Beaver Lake Eurasian Watermilfoil Eradication Project (Whitefish): FWP staff conducted follow-up surveys on June 2nd and found 10 EWM plants. Plants were removed and benthic barriers were installed to ensure no regrowth occurs. EWM eradication efforts have been ongoing on Beaver Lake for over 10 years. Only a handful of plants have been found over the past several years. With persistent survey and removal efforts we anticipate eradication of this population.
➡️The Flathead Biological Station and FWP AIS staff held an AIS training workshop on Flathead Lake on June 4th. Over 25 professionals and volunteers attended to learn about species identification, survey techniques, and sampling methods. AIS Survey Training News Story
➡️FWP AmeriCorps member Rayna Ponessa (photo attached) has been traveling the state this spring supporting angler education and AIS outreach. In the last couple of weeks she has presented to students, set up booths at festivals and events and educated new anglers. She has spoken to over 1,000 people in the last couple of months about AIS and is a valuable asset to Montana’s AIS Team. AmeriCorps is an outstanding resource to help engage and educate the public on AIS issues.
➡️If you are interested in hosting an AIS identification / early detection training / workshop in 2026, please reach out to Craig McLane for more information ([email protected])
Upcoming Events:
➡️June 23-24th: Columbia Basin Team for AIS in Missoula. https://www.westernais.org/regional
➡️September 23-25th: Western Regional Panel of the ANS Taskforce annual meeting. Sacramento, CA. Call for presenters: https://westernregionalpanel.org/annual-meeting/
➡️November 3rd: Annual AIS Partner Meeting. Montana Wild, Helena, MT. Save the Date.
➡️November 4th-5th: Montana Invasive Species Council Summit, Montana Heritage Center. Helena, MT. Save the Date.
In The News:
➡️New FWP Clean Drain and Dry your kayak video
➡️Wading angler Clean Drain Dry Video
➡️Confederated Salish and Kootenai Tribes explaining tribal watercraft inspection
➡️Western Regional Panel is accepting nominations for Best in the West aquatic invasive species professionals
➡️Regional coordination to protect the Pend Oreille basin
➡️Watercraft inspection in Yellowstone
➡️North Dakota zebra mussel eradication treatment in Smishek Lake
➡️Colorado initiates mussel sampling in the Colorado River
➡️Aquatic Invasive Species Control and Prevention Act Introduced in Congress
➡️Alberta steps up enforcement for watercraft inspection
➡️Saskatchewan PNWER AIS Summit Summary
➡️Clean Drain and Dry in Saskatchewan
➡️Golden mussels identified in drinking water treatment plant in San Jose, CA
➡️Watercraft inspection no longer required at Lake Oroville, CA
➡️Boat with golden mussels intercepted going to Lake Tahoe
➡️AIS management Success Stories.
Thomas Woolf | Aquatic Invasive Species Bureau Chief
Fisheries Division
Montana Fish, Wildlife & Parks
Office: (406) 444-1230 | Cell: (406) 438-5305
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