Our Mission

To protect natural resources from the threats of invasive species.


Our Vision

Healthy and resilient native ecosystems throughout the Gallatin Watershed.

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

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

Coffee Pot

Custer-Gallatin National Forest

Jack Creek Preserve

Gallatin Canyon Women's Club

Gallatin County Conservation District

Gallatin County GIS Department

Gallatin County MSU Extension

Gallatin County Weed District

Gallatin River Task Force

Gallatin Valley Land Trust

Greater Gallatin Watershed Council

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

Montana Weed Control Assoc.

Montana State University

MT Noxious Weed Education Campaign

Montana Weed Control Association

Multiple Big Sky HOA’s

Natural Resources Conservation Service

Ophir School

Rotary Club of Big Sky


Spanish Peaks Community Foundation

Spanish Peaks Mountain Club

Yellowstone Club

Yellowstone Club Community Foundation

Westscape Nursery

Wild Sheep Foundation

© Copyright 2020 by

Gallatin Invasive Species Alliance

Tel: 406.209.0905

Email: info@gallatinisa.org