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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.

Canada Thistle   arrow

Canada thistle (Cirsium (Breea) arvense)


Please note that there are some native thistles, which are not noxious plants.

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Extension Office is Open Under Strict Guidelines

Visits are by appointment only.