Skip to main content

Lefthand Canyon Fire

Unit Information

Boulder County Sheriffs Office
5600 Flatiron Parkway Boulder Colorado 80301

Incident Contact

Boulder County Office of Emergency Management
Phone: 303-441-1500

October 25 CalWood and Lefthand Canyon Fire Update

Lefthand Canyon Fire Wildfire
News – 10/25/2020

CalWood and Lefthand Canyon Fire Update
Sunday, October 25, 2020, 9:00 a.m.

Rocky Mountain Incident Management Team Black
Troy Hagan, Incident Commander 

Containment increases on CalWood Fire Ahead of Winter Storm Warning
Current Situation: The CalWood Fire reached 76% containment on Saturday. Fire behavior on both fires was minimal yesterday despite a Red Flag Warning being in effect. Smoke was observed from the fires, yet both fires remained inside established containment lines. A winter storm warning has been issued through 6 a.m. Monday morning for the fire area.

A winter storm has moved into the area, bringing the potential for significant snowfall and dangerously low temperatures. This morning, leadership from the Rocky Mountain Team Black will be monitoring fire conditions and accessibility near the CalWood and Lefthand Canyon fires. Snow, cold temperatures, and wind are creating unsafe wind chills, road conditions, and difficult access in many areas. When safe to do so, firefighters will continue reinforcement of established firelines.

As the road conditions improve and snow starts to melt, mop up and repair operations will begin along containment lines. “Mop up” is a term used to describe extinguishing residual fire to ensure the fire does not have the ability to continue to spread outside of an established containment line. Mop up includes actions like breaking apart smoldering debris, ensuring embers are completely extinguished, or moving burned debris so it cannot roll downhill and ignite previously unburned fuels. “Repair” means removing equipment from the fireline and signs of suppression actions from the landscape. 

This will be the last update on the Lefthand Canyon Fire unless significant activity occurs. The Lefthand Canyon Fire was contained on October 23 and remains 460 acres.

Weather & Fuel Conditions: A winter storm warning is in effect for the area over both fires from 6 a.m. Sunday morning until 6 a.m. Monday morning. In addition to snow, the storm will bring cold temperatures to the fire area, with high temperatures ranging from 8-15 degrees today. New snow accumulation of 3 to 7 inches is possible at lower elevations and 9 to 12 inches is possible in upper elevations. Due to the snow fall, fire is not expected to be active today. Chances of more snow will diminish by Monday.

Closures and Evacuations: Boulder County lifted the road closure for Highway 7 in South St. Vrain Canyon this morning. For more information on road closures and evacuations in Boulder County, please visit the Boulder County Office of Emergency Management website at or visit

The U.S. Forest Service has a temporary closure in place for all activities on Arapaho and Roosevelt National Forests lands in Grand, Clear Creek, Jefferson, Gilpin, Boulder, and Larimer counties; for more information on these emergency closures, please visit Multiple Boulder County Parks and Open Space properties are closed to public use; for more information on these closures, please visit

Air Quality: The Lyons, Longmont and areas near Boulder may experience moderate levels of smoke on Sunday. Please visit the CDPHE Air Quality page or find more localized information at A smoke forecast is available for the central Front Range; please visit for more information.

Emergency Alerts: Boulder County has an emergency notification system that allows residents of the county and all cities within to be notified of emergency situations. Notifications can be received in a variety of ways, including cell and land line phones, by text and/or by email. To sign up for alerts, please visit 

Temporary Flight Restrictions: Temporary Flight Restrictions are in place over the Calwood and Lefthand Canyon fires. Wildfires are a No Drone Zone. If you fly, we can’t. Whenever a drone is spotted near the fires, all aircraft will be grounded until the drone is confirmed as clear of the area. For more information, visit

CalWood Fire Statistics:
Size: 10,095 acres
Containment: 76%
Total Personnel: 376
Location: 3 miles N of Jamestown, CO
Reported: October 17
Cause: Under Investigation 

Lefthand Canyon Fire Statistics:
Size: 460 acres
Containment: 100%
Total Personnel: 24
Location: 1 mile E of Ward, CO
Reported: October 18
Cause: Under Investigation 

For More Information:
Fire Information Office: (720) 310-5598
Interactive Story Map: 
CalWood InciWeb:
Lefthand Canyon Inciweb: 
Facebook: @CalWoodAndLefthandCynFires

Related Information