Update: Bagby Fire in Mariposa County - 25% containment achieved

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Updated: 8:13 a.m. June 9

First discovered: 11 hours ago, 8:26 p.m. June 8

Initial location: Bagby Recreational Campground, Bear Valley, Mariposa County, Calif.

Fire unit: Cal Fire Madera-Mariposa-Merced Unit

Fire type: Wildfire

Fire name: Bagby Fire

Bagby Fire initially started 8:26 p.m. June 8 at Bagby Recreational Campground, Bear Valley in Mariposa County, California.

It has burned 23.3 acres after being active for 11 hours. As of Tuesday morning, 25% of the fire was brought under containment by a crew of 85 firefighters. The cause is, however, still being investigated.

The fire is fought by 12 engines, two water tenders, one helicopter, one dozer and five hand crews. According to Cal Fire, "Numerous firefighting air tankers from throughout the State are flying fire suppression missions as conditions allow."

See live video from the area:

Https://cameras.alertcalifornia.org/?id=Axis-Buckhorn

Fire containment

What does it mean for a fire to be 25% contained?

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 25% of the wildfire is halted from spreading, while 75% is still uncontrolled.

Containment is part of a larger plan for managing a wildfire. It is normally expressed as a percentage and it refers to how much of the fire perimeter has been surrounded/enclosed by a control line that firefighters create. The containment percentage indicates a certain level of control, but it doesn't always correlate to safety level. Also, it's important to note that containment doesn't mean a fire is out.

How is containment measured?

The incident's central command constantly receives progress reports from firefighters on the ground. As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage. The percentage tells the public how much of the fire perimeter is believed to not go beyond the control lines.

Source: Cal Fire

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This story was originally published June 9, 2026 at 6:56 AM.