Our Mission

To protect natural resources from the threats of invasive species.


Our Vision

​Healthy and resilient native ecosystems in the upper Gallatin Watershed.

Our Story

The alliance began in 2004, when two people witnessed spotted knapweed taking over Gallatin Canyon and decided to take action. Today, our organization is celebrating 16 years of positive impacts on the lands we love.

The Challenge

"Resource managers everywhere recognize that invasive non-native species are the biggest threat to the integrity and function of terrestrial and aquatic environments. The Gallatin watershed is no exception. Over several decades of resources management, I have seen landscapes recover from every type of calamity but I have never seen a landscape recover from the introduction of invasive species.” ~John Councilman, board chair, retired US Forest Service Resource Assistant, Custer-Gallatin National Forest

Important Work

Our project area encompasses some of the most ecologically and economically important resources in the state, providing vital habitat and water for plants, wildlife, and the people who live and recreate in the area. The Alliance works to address and mitigate the impacts of human activity upon natural resources to ensure that what we love so much about this place is not destroyed by our pursuit to experience it.


Annual Reports

Learn more about

what we do!

2020 Annual Report

2019 Annual Report

2018 Annual Report

2017 Annual Report

2016 Annual Report

2015 Annual Report

2014 Annual Report

2013 Annual Report

2012 Annual Report

2011 Annual Report

2010 Annual Report


Gallatin Invasive Species Alliance Board

The individuals who serve on the board represent a combined 160 years

of involvement and expertise in natural resources, horticulture, and invasive species.

Why Should I Care?


The Gallatin Invasive Species Alliance's project area encompasses some of the most ecologically and economically important resources in the state. The Gallatin River is a centerpiece within the Greater Yellowstone Ecosystem and provides vital habitat and water for plants, wildlife, and the people who live and recreate in the area. Those of us who live in this area of Montana choose to do so because of the abundance of recreational opportunities, the amazing and unique wildlife that resides here, and the stunning beauty of the landscape.


The effect of noxious weeds on plant diversity and ecology can cause the loss of wildlife habitat. Infestations of noxious weeds displace native plants and change water flow and availability. Spotted knapweed populations alone reduce available winter forage for elk by 50 to 90 percent. Noxious weeds also increase soil erosion and soil sedimentation, which can have a devastating impact on fishery populations in our local rivers and streams. Runoff is 1.5 times higher and sediment yield was found to be 3 times higher on areas dominated by spotted knapweed than on areas with native grasses.

Learn more here:  Why Should I Care?

Leveraging Assistance Through Partnerships

The Alliance spends significant time and effort toward its goal of coordinating efforts and working cooperatively with various federal, state, and local agencies in invasive species education and control within in the project area.

Personnel from partner organizations assist with community events, education and outreach, noxious weed treatments, logistical support, and funding. Their commitment and willingness to participate are major contributors to the successes the Alliance has achieved over the past 14 years.

Our Partners

Beehive Basin Brewery

Big Sky Community Organization

Big Sky Landscaping

Big Sky Owners Association

Big Sky Resort

Big Sky Resort Tax

Big Sky Water & Sewer

Bridger Brewing Company

Bucks T-4

Coffee Pot

Custer-Gallatin National Forest

Dept. of Natural Resources and Conservation

East Slope Outdoors

Jack Creek Preserve

Gallatin Canyon Women's Club

Gallatin County

Gallatin County Conservation District

Gallatin County GIS Department

Gallatin County MSU Extension

Gallatin County Weed District

Gallatin River Task Force

Gallatin Valley Land Trust

Gallatin Watershed Council

Great Bear Native Plants

Greater Yellowstone Coordinating Cmte

Historic Crail Ranch

Madison County Weed District

Madison Gallatin Trout Unlimited

Moonlight Basin

Moonlight Community Foundation

Montana Conservation Corps

Montana Department of Agriculture

Montana Department of Transportation

Montana Fish, Wildlife and Parks

MT Noxious Weed Education Campaign

Montana State University

Montana Weed Control Assoc.

Montana Weed Control Association

Montana Wilderness Association

Multiple Big Sky HOA’s

Mystery Ranch

Natural Resources Conservation Service

One Montana

Ophir School

Rad Bikes

Rotary Club of Big Sky


Spanish Peaks Community Foundation

Spanish Peaks Mountain Club

Yellowstone Club

Yellowstone Club Community Foundation

Westscape Nursery

Wild Sheep Foundation