Prescribed burn to begin on Thomas Mountain

USFS Press Release

The San Bernardino National Forest, San Jacinto District is planning to conduct prescribed burning Monday, November 9 through Saturday, November 14,  2026 on the Thomas Mountain Project, pending all required approvals.   

More than 100 firefighters from the Forest Service and partner agencies will treat approximately 2000 acres on the north side of Thomas Mountain. Located along the west side of Garner Valley near Lake Hemet, the operation will include both ground-based and aerial ignition operations. 

Following completion of active ignitions, firefighters will conduct several days of mop-up and patrol operations as needed. Firefighters will monitor the area until all fire is extinguished.

Broadcast burning is a technique that spreads fire across the landscape in a controlled manner using drip torches, helicopters, or unmanned aerial systems. Operations are closely monitored to ensure fire remains within designated boundaries. Approximately 50% of the vegetation within the treatment area is expected to burn, creating a mosaic of burned and unburned vegetation.

Temporary closures will be in effect during operations, including:

• Thomas Mountain Road (Forest Road 6S13)
• Tool Box Springs
• Thomas Mountain Yellow Post campsites
• Ramona Trailhead

Motorists traveling on Highway 74 may also experience brief traffic delays or temporary closures during aerial ignition activities. These closures are necessary to ensure the safety of both the public and firefighting personnel.

Prescribed fire is an important tool used to reduce hazardous vegetation and help protect nearby communities, infrastructure, and natural resources from future wildfires.

Residents and visitors may see or smell smoke during burning operations. For current air quality information, visit AirNow. When driving in smoky conditions, slow down, turn on your headlights, and allow extra distance between vehicles.

Firefighters and fuels specialists will evaluate weather and fuel conditions before each day’s operations. If conditions become unfavorable, scheduled prescribed burning activities may be postponed or canceled.

For updates on prescribed fire activities, visit the forest website or follow the San Bernardino National Forest on social media.