Larimer County Forestry Department

The Larimer County Forestry Program is dedicated to serving the citizens of Larimer County and assisting with questions and concerns of vegetation, primarily woody plant material or related issues on their properties and on county lands, including rights of ways. Larimer County has a diverse landscape and the issues of the property owners of Larimer County are as diverse. It is our intent to respond to all questions in a timely manner, which may be a site visit, a telephone call, an email or directing one to the person or agency which will provide the best information to the question asked. These services provided are for both urban and traditional forests.

Larimer County has experienced a number of natural but destructive events over the past 10 years which will affect private property in both the flatlands and mountainous areas of the county for years to come. Continuing and new issues are on the horizon but with continued efforts by you the private citizens and Larimer County we can preserve our wonderful landscape.


  1. Promote forest health education and awareness by way of community presentations and site visits.
  2. Forest and landscape information upon request to county residents.
  3. Assist other County Departments with matters concerning vegetation on County lands including county rights-of-ways.
  4. Landscape installation inspections for the Larimer County Planning Department.
  5. Enforcement of the state statutes (C.R.S. 35-4-101 thru 116) the “Pest Control Act”, dealing with mountain pine beetle, spruce ips, Douglas fir beetle, thousand cankers disease and Dutch elm disease. County pest inspector description

Current pest issues in Larimer County

There is good news and there is bad news. The mountain pine beetle (MPB) issue that has caused major tree loss in the ponderosa/ lodgepole pine forests of Larimer County has seen a major decline of newly infested trees. This does not mean that the issue has gone away, just that numbers are down. The Redfeather Lakes area is still an area of concern. For more information and links go to MPB.

Thousand canker disease (TCD) affects black walnut trees and is a result of attacks of the walnut twig beetle and associated fungus. TCD will kill most black walnut trees in Larimer County. Sanitation is the key to limiting the spread of the TCD. As the steward of your property removal of affected trees and the destruction of the complete tree or approved treatment of the usable wood within the affected area is required. See link TCD for more information.

Emerald ash borer (EAB) though not identified in Larimer County at this time has been has been found in Boulder County which has caused a quarantine to be imposed for all untreated ash wood and plants from leaving that county. I do believe that it is only a matter of time before EAB is found in Larimer County and will have a major impact on all ash trees in Larimer County. Click link for more information on EAB

Fire and related issues

Larimer County has been for many year an area of concern for potential devastating wildfires, we were lucky. Our luck ran out and there are still many areas of concern in Larimer County. As landowners in the forested areas of Larimer County there is much that can be done to limit the impacts of wildfire on your property and in your community, it is one landscape. Please follow this link to learn to be "Firewise" or visit

With all these issues feel free to contact this office for advice and/or any assistance we can offer. We do like to get out of the office.

Contact Information

To schedule site visits, educational presentations or for management recomendations please contact:

Larimer County Forester
Dave Lentz

Physical Address
2649 E. Mulberry St, Suite 6
Fort Collins, CO 80524

Mailing Address
PO Box 1190
Fort Collins, CO 80522

(970) 498-5765
(970) 498-5776 Fax

Office Hours
7:00 a.m. - 3:30 p.m.
Monday - Friday
(except Holidays)

For information on tree problems within Fort Collins city limits, call the City of Ft. Collins Forester at 221-6660.

For information on wood or tree cutting permits, call the U.S. Forest Service at 295-6700.

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