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About Denver Forestry

Forestry promotes good and maintainable tree canopy around the city, including private property. We provide advice, licenses tree care companies and issues permits for the planting and removal of trees. You may request a permit by email to, including a description of the work to be done.

Forestry provides many services to residents and business, including the setting of guidelines for major landscaping projects and conducting special programs to promote tree planting and care (such as the Mile High Million program and the Champion Tree Registry). If you plant a tree – tell us about it so we can Count Your Tree!

Denver has been recognized by the National Arbor Day Foundation as a Tree City USA every year since 1986 for its excellent programs and results to promote the growing and care of the right tree in the right place.

The recent confirmation of Emerald Ash Borer (EAB) within the City of Boulder introduces a new tree pest to the metro-Denver urban forest that could impact 100’s of thousands of property owners across the Front Range of Colorado. Denver alone has an estimated 330,000 ash trees at risk, and losing these trees will have adverse economic, environmental and social impacts on our community. Over the next decade EAB has the potential to destroy more of Denver’s urban forest than any other disease or pestilence in history.

State officials have established quarantine boundaries for Boulder County, and it is important to stress that this is currently the only known infestation in the state. The Colorado Department of Agriculture will be working to perform inspection and sampling surveys across the City of Boulder in an effort to determine the extent of the infestation.

Since the announcement of EAB being found in Boulder, Denver’s Forestry staff members have completed several hundred miles of inspections and at this point no signs of EAB have been found within Denver.

With now over a decade of EAB experience in North America, it has become very clear that ash trees can be well protected through proper preventative pesticide treatments. The Colorado Department of Agriculture does not recommend property owners start EAB preventative treatments until an infestation is found within 5 miles of a property.

At this point in time Forestry is working to identify significant ash trees within parks and public rights-of-way, and developing an official EAB response plan for Denver. If you have specific questions about park ash trees, or the right-of-way ash trees adjacent to your private property send a message to

For further information, follow these links:

The Denver Parks and Recreation Forestry Office is the city agency responsible for trees and shrubs in public parks, parkways and around government buildings. Trees are an extremely valuable resource that not only provides attractive landscapes, but also replenishes oxygen in the atmosphere, cools us with shade in the summer and helps clean the air. Denver is a fortunate city with a broad tree canopy and public policies that recognize the value of trees through promotion programs and regulation. 

The Office of the City Forester is responsible for the direct maintenance of public trees within parks and designated parkways, oversight of privately maintained trees per Chapter 57 of the municipal code, and taking actions to improve the overall quality of Denver’s urban tree canopy.

Trees are an extremely valuable resource that not only provide attractive landscapes, but also increase property values, create neighborhood character, replenish oxygen in the atmosphere, improve water quality, and reduce temperatures through shading.

Denver’s publicly owned street trees are under regulation of the City Forester, but their maintenance responsibility is shared across the city by adjacent landowners. It is important to remember that permits are required prior to the removal or planting of any street trees. You may request a permit by sending an email to, including a description of the work to be done.

In 2006 the Metropolitan Denver area took an ambitious step towards more sustainable development by launching the Mile High Million (MHM) Tree Initiative. The MHM goal is to plant one million trees by 2025. Thus far 250,000 trees have been planted. There is growing recognition that trees provide long-term environmental, economic, and health benefits critical to vibrant and livable cities. Read more about the Urban Forest Assessment here.

Final Report (3/2013)

Urban Forest Information by the Numbers (graphic)

A State Champion Tree is the largest known tree of its species in the state. Rankings are based on three measurements: the circumference of the tree at 4 ½ feet, the height of the tree, and the tree’s average crown spread. Based on these measurements, each tree is given a point total to determine its state and national ranking. This scoring system has been developed by American Forests.

The Denver Champions and Notable Tree document lists each of the 126 State Champion Trees found within the City and County of Denver. In the document, the circumference has been changed to diameter and is listed in the column labeled DBH (diameter at breast height). The “T” referenced in the rank column denotes a tree that shares its status as a state champion with at least one other tree.

Thirty-two state champions are located at the Denver Botanic Gardens, and fourteen state champions and twenty-nine notable trees are located in Denver park and parkway system. Many other state champions, thirteen in all, reside at location schools and universities.

A number of the trees listed are on private property and are distinguished as such by the word private in the last column. Please respect the property owner’s right to privacy by viewing the tree from the street. Thank you very much for your cooperation. We hope you enjoy viewing these remarkable trees!

Download Denver Champions and Notable Trees information provided by the Colorado Tree Coalition.

Download the City Park Arboretum Tree Walk Map and Tree Species List.

Denver's urban forest shades 19.7% of Denver with 2.2 million trees and saved more than $6.7 million dollars in energy costs for cooling. Download the full facts sheet.

Volunteer opportunities include:,,,. Visit the Volunteer Page, Forestry Volunteers, for more information on DPR volunteering.

This area is currently under construction.