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Pinnacle Fire

Unit Information

Coronado National Forest
U.S. Forest Service
300 W. Congress St.
Tucson, AZ 85701

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Incident Contact

Fire Information
Phone: 928-362-8820
Hours: 8:00 am - 8:00 pm

Highlighted Activity

06/20/2021 Wind Direction Challenges Containment Efforts
Public Information: (928) 362-8820Media: (928) 362-2771Email:     Size:  Approximately 31,715 acres                       Containment:...
News - 06/20/2021
Aerial perspective of fire burning in Santa Teresa Wilderness Image options: [ Full Size ]

The Pinnacle Fire started on June 10, 2021. It is burning mostly within the Santa Teresa Wilderness on the Coronado National Forest approximately 18 miles south of Bylas, Arizona.  Steep, rocky terrain at around 5,000-feet elevation and record heat and low relative humidity have contributed to fire spread. The fire initially grew towards the east and northeast forcing evacuations for residents north of the Klondyke/Aravaipa Road. By mid-June, suppression actions and a shift in wind to the west kept most of the fire growth within the Wilderness, but it is threatening the communities of Black Rock, Klondyke and Aravaipa. The occurrence of frequent wind shifts are pushing the fire in new directions. The containment lines along the eastern and southern portion of the fire are holding and that area of the fire remains calm. Firefighters are pre-positioned outside the Santa Teresa Wilderness with constructed dozer lines to defend private property and other values. Protecting private property while preserving Wilderness and cultural values during record high heat have been determining factors in suppression tactics for the Pinnacle Fire.
Southwest Area Incident Management Team 3, lead by Incident Commander Dave Gesser, assumed command of the Pinnacle Fire at 6:00am June 12, 2021.
Smoke from the Pinnacle Fire and surrounding wildfires across the region are impacting the local area. Smoke information can be found at
Fire updates will be posted on the Pinnacle Fire Facebook and Twitter as well as Inciweb.

Basic Information

Current as of
Incident TypeWildfire
CauseUnder Investigation
Date of OriginThursday June 10th, 2021 approx. 12:00 PM
Location18 miles south of Bylas, AZ
Incident CommanderIC Dave Gesser, Deputy IC Lance Elmore
Incident DescriptionFire Is Actively Burning In Grass And Brush.
Coordinates32.865 latitude, -110.201 longitude

Current Situation

Total Personnel453
Size31,715 Acres
Percent of Perimeter Contained25%
Fuels Involved

Short Grass (1 foot) Brush (2 feet) Timber (litter and understory)

Significant Events

Active, Wind Driven, Running, Spotting. Fire remains active with high temperatures and low humidity which makes fuels readily available to burn.


Planned Actions

Full Suppression

Projected Incident Activity

12 Hours:

Fuels are readily available to burn actively due to weather conditions with high temperatures, low relative humidity and changes in wind direction. Winds from a westerly direction will keep fire very active. In addition to terrain influences, thunderstorm cell passage will result in gusty and erratic winds that may have significant influence on the fire behavior and increase rate of spread in multiple directions as they pass along the fire area.

24 Hours:

The potential of thunderstorm passages in the area will likely increase fire behavior as there are no changes in the current weather pattern of high temps and low relative humidity. Wind directions are variable with strong outflows from thunderstorm passage.

48 Hours:

Weather patterns are unchanged and continue to keep fuel availability high. Winds will have transitioned to a northwesterly direction and may cause the fire to be very active during both day time and night time while testing new control lines.

72 Hours:

The current weather patterns of temperatures and humidity will persist, and will keep fuel availability high. Fire activity will remain constant in areas where little or now suppression activity has taken place.

Anticipated after 72 Hours:

Thunderstorms will continue to develop. Potential passage of thunderstorms will continue to cause the fire to burn actively.

Current Weather

Weather Concerns

Another day of near record heat is expected, with afternoon temperatures between 104 and 100 and relative humidity in the single digits. The wind was generally from the north to the northwest between 6 and 12 mph with some gusts approaching 25 mph; however, local terrain effects continued to influence both wind speed and direction.

Hot, dry and very breezy weather is expected Sunday and Monday with triple digit heat, relative humidity in the single digits and lower teens along with northwest to west winds between 10 and 20 mph, gusting to near 30 mph. A slight cool down is expected through the week with a gradual increase in both humidity and thunderstorm chances. The chance for measurable rainfall will remain low, but strong, erratic outflow winds and isolated lightning strikes will be likely with any storm activity.