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The CSU Extension in Gilpin County helps mountain residents improve their quality of life by offering a website, classes and programs that provide unbiased, research-based information on forestry, wildfire, wildlife, mountain gardening, noxious weeds and many other issues. Through our 4-H programs, we help youth develop life skills through leadership opportunities.

Knapweed   arrow

Diffuse knapweed (Centaurea diffusa) and Spotted knapweed (Centaurea maculosa)


State law: Diffuse knapweed must be eradicated or contained in Gilpin County. If you live in a “containment” area, it does NOT mean you can let the knapweed grow freely on your property.

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Extension Office is Open Under Strict Guidelines

Visits are by appointment only.