We invite Citizen Scientists to participate in our annual Glacier National Park Noxious Weed Blitz each year on the third Tuesday in July (check our web page to confirm date). Citizen Scientists are trained to identify five invasive plants and map their locations with GPS units. The Noxious Weed Blitz is an all-day event where volunteers attend a training presentation in the morning, and in the afternoon, volunteers separate into groups to search for and pull invasive plants along park trails. Species targeted by the program are Spotted Knapweed (Centaurea stoebe), Oxeye Daisy (Leucanthemum vulgare), Houndstongue, (Cynoglossum officinale), St. Johnswort (Hypericum perforatum) and Yellow Toadflax (Linaria vulgaris). The Noxious Weed Blitz provides valuable education to visitors and helps Glacier National Park reduce weed populations along park trails. Participants can use the knowledge they gain to educate friends and neighbors and identify and reduce weeds in their own yards.