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Calwood Fire

Unit Information

Arapaho and Roosevelt National Forests and Pawnee National Grassland
U.S. Forest Service
2150 Centre Avenue Building E
Fort Collins, CO 80526

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October 19 CalWood and Lefthand Canyon Fire Update

Calwood Fire Wildfire
News – 10/19/2020

Calwood and Lefthand Canyon Fire Update 
Monday, October 19, 2020, 10:00 a.m. 

Rocky Mountain Incident Management Team Black 
Troy Hagan, Incident Commander  

CalWood and Lefthand Canyon Fires Less Active Sunday; Crews Making Progress  
Current Situation:
The higher humidity with the inversion layer covered most of the CalWood Fire for most of the day yesterday, which led to minimal fire activity and no measurable fire growth. Due to the inversion, aircraft use was limited through the day. Crews worked extensively on all divisions of the fire constructing line as direct as possible to the fire’s edge. Control lines were constructed between the fire and structures on the west and southwest side of the fire. Today, crews will continue line construction to protect structures and gain further containment. Aircraft will be used to support those crews if conditions allow. Crews on the east side of the fire will be mopping up and securing lines near the Highway 36 corridor and in places where lines are complete. 
The Lefthand Canyon Fire was largely above the inversion layer yesterday, so aircraft were used extensively in assisting ground crews. Firefighters constructed containment lines yesterday and that work will continue today with the assistance of aircraft when possible. Crews will also work to minimize fire spread and patrol for spot fires as activity increases through the day.

Rocky Mountain Type 2 Incident Management Team Black assumed command of both the CalWood and Lefthand Canyon Fires at 6:00 a.m. this morning. “We appreciate the hard work and quick action by the Boulder Incident Management Team and all of the many responding agencies,” said Team Black Incident Commander Troy Hagan.

Weather & Fuel Conditions: Weather over both fires is expected to be sunny through the morning then partly cloudy in the afternoon. Temperatures are expected to be 58-64º and humidity 20-22%. Winds over the CalWood Fire are expected to be 8-12 mph out of the west through the day with gusts up to 20 mph this afternoon. Winds over the Lefthand Canyon Fire are expected to be 10-15 mph with gusts to 30 mph. Despite yesterday’s higher humidity, fuels remain critically dry and fire activity is expected to increase midday as humidity decreases and heat will be stoked by the increasing winds. 

Closures and Evacuations: Road closures, evacuation orders, and evacuation warnings put in place by Boulder County Sheriff’s Office remain in effect for areas near both the CalWood and Lefthand Canyon fires. For more information on evacuation orders near both fires, please visit  The U.S. Forest Service also has a closure in place on the Boulder Ranger District for public safety and to support firefighting efforts. Please visit:

Air Quality: Colorado Department of Public Health and Environment (CDPHE) has issued an Air Quality Action Day Alert for the Colorado Front Range until at least 4pm Monday due to moderate to heavy smoke near the Cameron Peak, CalWood, and Lefthand Canyon fires. For further information on smoke forecasts and public health, please visit the CDPHE Air Quality page or find more localized information at

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: 8788 acres
Containment: 15%
Total Personnel: 248
Location: 3 miles N of Jamestown, CO
Reported: October 17
Cause: Under Investigation
Lefthand Canyon Fire Statistics:
Size: 320 acres
Containment: 4%
Total Personnel: 46
Location: 1 mile E of Ward, CO
Reported: October 18
Cause: Under Investigation

For More Information:
Boulder County Call Center: (303) 413-7730
Facebook: @CalWoodAndLefthandCynFires

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