The City of Boulder conducts prescribed burns to improve the health of city open space ecosystems and to reduce the fire danger for Boulder residents.
Currently Planned Prescribed Burns
- Shanahan Ridge: The City of Boulder’s Open Space and Mountain Parks (OSMP) Department and Boulder Fire-Rescue are anticipating conducting a 5-acre prescribed burn on Shanahan Ridge on Wednesday, May 9. This burn will help create a perimeter for additional burning that could occur through May 31. Prescribed burning will only be conducted if and when weather and vegetation conditions are acceptable to assure the safety of the public and to minimize the potential impacts of smoke. Should the fire be conducted, Boulder residents, motorists on highways in and out of Boulder and open space visitors will see smoke from this planned burn. Residual smoke after ignitions are completed.
Ignitions will begin after 10 a.m. and will end before 4 p.m. View a map of the burn area , which is near the South Shanahan Fork, Bluestem Connector and the Big Bluestem East trails. Boulder Fire-Rescue will supervise the planned burn, and firefighters will monitor the burn at all times until it is safely extinguished. OSMP will temporarily close portions of the South Shanahan, Bluestem Connector and Big Bluestem East trails while the burning is underway.
This burn will help meet OSMP forest ecosystem management objectives, including removing dead grass and forest litter that can inhibit native plant growth, improving forest habitat for native wildlife species and reducing fuel accumulations to minimize the risk of an intense wildfire.
Prescribed fire smoke may affect your health. For more information, please visit:
If you want information about Boulder's efforts to reduce fire danger for residents and open space, please contact Kim Scott with Boulder Fire-Rescue at 303-441-4355. To learn more about how prescribed burning helps improve forest ecosystems, please contact Phillip Yates with Open Space and Mountain Parks at 720-564-2051. If you are a member of the media, please contact Shannon Aulabaugh at 303-441-3370.
Notifications and Updates
The City of Boulder seeks to inform the public about planned burns in advance of any ignitions through social media updates through the city’s Facebook, Twitter and NextDoor accounts and a press release to local media. A banner on top of BoulderColorado.gov will also appear when the city is conducting burns.
If the city is planning burns along the mountain backdrop, the City of Boulder will work with CDOT to include messaging about planned burns on message boards along U.S. Highway 36 and Highway 93. Additional notifications include signs along open space access points and trail junctions, and signs in nearby neighborhoods.
Every prescribed burn goes through an extensive planning process to consider ecological goals, the resources required, potential fire and smoke behavior, crew logistics, and desired weather and fuel moisture conditions. In advance of burns, firefighting staff can use a variety of techniques for controlling the burn. Mowing of fuels, extensive hose lays, wetting down burn boundaries, or burning off small areas of fuel are all tools used to create holding lines around a burn unit. When planning burns, City of Boulder staff take every precaution to ensure that there are either natural or man-made features that serve as “fire breaks,” which help control prescribed burns.
Boulder Fire-Rescue firefighters monitor prescribed burning at all times until the burns are safely extinguished. For larger burns, Boulder Fire-Rescue calls in firefighters from local, state and federal agencies to help manage and extinguish prescribed burns.
Conditions and Weather
Prescribed burning is only carried out if and when weather and vegetation conditions are acceptable to assure the safety of the public and minimize the potential impacts of smoke. Weather is an important driving factor in prescribed burning and can dramatically influence the success of a burn. In some cases, prep work is completed but the burn may be called off because the proper weather or fuel conditions can’t be met.
Depending on the fire’s location and its size, OSMP may close trails during prescribed burns. For trail closure information during a prescribed burn, please visit OSMP.org. or come back to this site.
Prescribed fire smoke may affect your health. For more information, please visit the Colorado Department of Public Health and Environment. Residents will see smoke from small and large burns. Residual smoke may be seen after burns are completed. Firefighters will remain on scene until all burns are completely extinguished. Young children – especially those under 7 years - older residents, those who have pre-existing respiratory or circulatory conditions and pregnant women may be affected by smoke. To avoid smoke, please close windows and stay indoors.
Frequently Asked Questions
Why conduct prescribed burns?
Historically fire played a significant role in maintaining the ecological health of our forests and prairies. Low elevation ponderosa pine forests and grasslands burned as frequently as every 5 to 30 years. But with the growing population and urbanization of the West, fire suppression has become the norm. That has allowed forests to become denser and vegetation to grow rampantly, creating larger fire risks for some communities, while also stunting important ecological processes.
Today, scientists have decades of research citing fire as an essential element to maintain forest health and to protect our native species. By introducing prescribed fires, the City of Boulder can restore the natural balance for Colorado’s fire-adapted ecosystems and reduce the amount of fuel in the forest during a wildfire.
Why does fire help restore important ecological processes to forests and other areas?
In our agricultural operations, fire is an essential tool for maintaining irrigation ditches and ensuring water flows throughout the system. It also can be used to clear fields, control weeds and improve forage for grazing. Low-intensity burns in grasslands and forests remove dead vegetation and needles that can quickly accumulate. A build-up of dead material can inhibit the growth of native plants and decrease the habitat value for wildlife. Burning cycles nutrients back into the soil, and results in more dense and diverse native vegetation.
Regular burning can also remove small trees that create competition for larger, mature trees in a forest. By managing forest density through fire, the remaining trees are healthier and more resistant to high-intensity wildfires and forest insects like Mountain Pine Beetle.
How does OSMP choose areas where it will use prescribed burns?
Burn selection is always a balance between risk and benefit. Can we effectively burn an area to meet the ecological goals while minimizing the risk and impacts to surrounding neighbors and resources? The highest priority is public safety. Considerations such as fuel type, topography and the ability to maintain perimeter lines are critical in evaluating potential prescribed burn locations.
It’s also essential to consider the ecological benefits. Every managed area has a list of ecological goals we hope to meet through burning. We also consider the strategic benefit of a prescribed burn on the landscape. With any prescribed fire, one of the end results is a decrease in fuel load, and in certain areas, this can create a fuel break to protect nearby homes and private property.
The city’s Forest Ecosystem Management Plan and Grassland Ecosystem Management Plan – which lay out how OSMP will accomplish its ecological responsibilities mandated by the department’s charter – identify prescribed fire as an important management tool and a high-priority conservation strategy.