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Boulder County
Parks & Open Space

5201 St. Vrain Road
Longmont, CO  80503
map

tel (303) 678-6200
fax (303) 678-6180

Boulder County Fairgrounds
9595 Nelson Rd.
Affolter House
Longmont, CO  80501
map
tel (303) 678-6235
fax (303) 678-6322

 


Weeds

State-mandated "List A" species

Boulder County noxious weed list

The Boulder County weed management program is responsible for weed control efforts on approximately 25,000 acres of Parks & Open Space (POS) land designated as natural areas; 7,000 acres of POS agricultural leased land that also serves as wildlife habitat, and 685 miles of county maintained road right-of-way.

The Boulder County Noxious Weed Management Plan guides all management activities. The weed crew utilizes an integrated management approach consisting of herbicide application, mowing, hand pulling, insect bio-control, and cultural control. These are outlined in our Weed Management Policies and Procedures document. It must be recognized that not every tool can be successfully used in every situation and there will be site-specific needs that will require flexibility to achieve the best weed management.

Management is a challenge, as weed problems in Boulder County are as varied as the county’s topography. Newly introduced weed species are a constant concern, with an influx of people from all partsStar Thistle. of the country transporting weed seed by way of livestock and/or vehicles. It is important that property owners on the upper ends of Boulder County’s watersheds are aware of noxious weed issues and actively control weeds as necessary.


Planned Herbicide Applications

The integrated management approach of noxious weeds in Boulder County includes the use of herbicides. Concerned individuals can check here for a weekly update of planned herbicide application locations.

The following locations may be subject to herbicide applications* the week beginning August 25:

Adler/Fingru
Ann U. White Trail
Boulder County Fairgrounds
Boulder County Recycling Center
Callahan
Caribou Ranch Open Space
Coal Creek/Rock Creek Trail
Hall Ranch Open Space
Harney-Lastoka Open Space
Heil Valley Ranch Open Space
Hillside
Lagerman Reservoir
Monarch Park
Mud Lake
Niwot Trail
Pella Crossing
Rock Creek Farm

N 39th Street
N 41st Street
N 49th Street
S 66th Street
N 75th Street
71st Street
N 77th Street
87th Street
95th Street
115th Street
119th Street
Airport Road
Apple Valley Road
Arapahoe Road
Baseline Road
Cherryvale Road
County Road 126
E. County Line Road
N. County Line Road
Crane Hollow Road
Empire Drive
Flaggstaff Road
Four Mile Canyon Drive
Gold Hill Road
Jasper Road
Jay Road
Isabelle Road
Lickskillet Road
Linden Drive
Lee Hill Drive
Lefthand Canyon Drive
Lookout Road
Magnolia Road
Marshall Road
Monarch Road
Nebo Road
Neva Road
Nimbus Road
Niwot Road
Ogallala Road
Old South St. Vrain Road
Olde Stage Road
Sawmill Road
South Boulder Road
Spine Road
Sugarloaf Road
Sunshine Canyon Drive
Ridge Road

*locations may be treated with Endurance, Escort XP, Habitat, Hardball, Milestone, Redeem, Roundup Pro, Telar XP, Tordon 22k, and/or Transline.

For a daily update and more details, call the Herbicide Application Information number, 303-441-3940.
 

Contact Information for Weed Management Activities in Boulder County

Parks and Open Space: (303) 678-6291
County Right-of-Way: (303) 678-6294
County Weed Enforcement: (720) 564-2621
Colorado Department of
    Transportation (CDOT): (970) 587-5141
Colorado Department of Agriculture: for information related to weed law, chemical sensitivity, organic farms, weed-free forage, (303) 239-4100
 

Related Links:

Some other interesting weed sites:

Colorado Weed Management Association
Western Society of Weed Science
National Pesticide Telecommunications Network
Colorado Department of Agriculture


 

 

Black-tailed prairie dog.

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