Mason Fire in Kaibab National Forest reaches final size, 4,370 acres, 22 days

TUSAYAN, Ariz. — The Mason Fire on the Tusayan Ranger District of the Kaibab National Forest in Arizona has been contained after growing to 4,370 acres and providing multiple resource benefits since it started a few weeks ago.

Map of the Mason Fire | Image courtesy of Kaibab National Forest Public Affairs Officer Jacqueline C. Banks, St. George News
Map of the Mason Fire | Image courtesy of Kaibab National Forest Public Affairs Officer Jacqueline C. Banks, St. George News | Click map to enlarge

The Mason Fire, located 7 miles southeast of Tusayan and 4 miles south of Grandview Lookout Tower, was one of four lightning-caused wildfires being managed as part of the Jar Complex to achieve ecological and other resource and community protection objectives.

The Old Fire eventually merged with the larger Mason Fire, while the Lost and Shale fires that were located just east of Highway 64, several miles south of Tusayan, never grew larger than about an acre in size each due to persistent rain showers over their locations.

“The Lost and Shale fires were in an ideal location, and we hoped they would eventually pick up in activity so that fire could move across the landscape,” said Quentin Johnson, fire management officer for the Tusayan Ranger District and incident commander for the Jar Complex, “but it was the Mason Fire that ended up having the most growth potential, and we are pleased that it reached the size it did.”

The Mason Fire burned at low-to-moderate levels of intensity over the course of its existence and had effects fire managers said were important in enhancing wildlife habitat, reducing the potential for future high-intensity fires and improving forest health conditions.

As noted by Bruce Hill, fire lookout at Red Butte and a valued member of the Tusayan Ranger District fire organization, the Mason Fire not only met resource objectives but did so without impacting visibility at Grand Canyon National Park, an accomplishment that is not always easy to achieve given the district’s location just south of the iconic canyon.

While smoke was visible at times from Desert View, Cameron, Tusayan and highways 64 and 180, impacts were short-lived and mostly isolated to light smoke sinking into low-lying areas south of Tusayan along Highway 64 in the early morning hours on a few days.

Johnson said he was proud that fire was able to play its natural role as a disturbance factor in the ecosystem and that, during its 22 days of spread, there were no injuries to firefighters involved in its management.

The Mason and Old fires were both managed within a predefined 16,100-acre planning area. However, as the fires merged and spread into sparser fuels, they naturally started dying out on their own. Then, significant precipitation associated with Hurricane Dolores reached the Mason Fire over the weekend, putting it out almost entirely.

“For us, a planning area represents where we would be comfortable with and think the fire could eventually spread given the right conditions,” Johnson said. “It doesn’t mean it’s always going to get there, and that’s OK. We are allowing the fire to do what it would have naturally done historically. It would have been started by lightning during monsoon season, moved around for days or weeks and then been put out by rain or by reaching natural landscape features. That’s exactly what happened with the Mason Fire. To me, that’s a success story.”

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