The Wallow Fire was a wildfire that burned 538,049 acres across eastern Arizona and western New Mexico in the summer of 2011, making it the largest wildfire in Arizona’s recorded history. It began on May 29, 2011, in the Apache-Sitgreaves National Forest after two cousins left a campfire unattended. The fire destroyed 32 homes, four commercial properties, and 36 outbuildings, forced evacuations across several mountain communities, and cost about $95 million to suppress. The two men responsible were charged with federal misdemeanors, sentenced to brief jail time and probation, and ordered to pay $3.7 million in restitution, which they later settled for a fraction of that amount.
Who Started the Wallow Fire
Caleb Joshua Malboeuf, 26, of Benson, Arizona, and his cousin David Wayne Malboeuf, 24, of Tucson, built a campfire in a rock ring in the Bear Wallow area of the Apache-Sitgreaves National Forest on May 28, 2011. They started a second fire the next morning. A U.S. Forest Service investigation found that they had not cleared flammable material from around the ring and took no steps to put the fires out, assuming they would burn themselves out. The cousins then left for a hike. Dry, windy conditions pushed the fire out of the ring and into the surrounding forest.1Tucson Sentinel. Wallow Fire Charges Filed
How Far the Fire Spread
The fire was first reported on May 29, 2011, and moved quickly through overgrown forest where tree density had climbed to more than 400 trees per acre, far above the historical range of 20 to 60.2Tucson Sentinel. Managing Forest Helped Stop Wallow Fire on Reservation By June 9, it had destroyed 22 homes in the small community of Greer, damaged five more, and taken out 24 outbuildings. Sixteen additional structures were damaged or destroyed elsewhere in the burn zone.3Tucson Sentinel. Wallow Fire Destroys 22 Homes in Greer, Threatening Eagar
Greer was evacuated on June 7, 2011. The next day, with the main head of the fire within a mile of town, authorities ordered evacuations in Eagar and Springerville, and the American Red Cross opened a shelter at Blue Ridge High School in Pinetop-Lakeside.3Tucson Sentinel. Wallow Fire Destroys 22 Homes in Greer, Threatening Eagar In New Mexico, Catron County evacuated about 100 homes near the border community of Luna and put 200 more on notice while crews used DC-10 tankers and firebreaks to try to hold the fire at the state line.4ABC News. Wallow Fire Set to Cross State Line Into New Mexico
At its peak, more than 4,700 firefighters were on the lines. Full containment came on July 8, 2011. By then the fire had burned 534,639 acres on the Apache-Sitgreaves National Forest, roughly 13,000 acres on the Fort Apache Indian Reservation, about 9,200 acres on San Carlos Apache land, more than 15,000 acres in New Mexico, and approximately 10,800 acres of state and private land.5GovInfo. Senate Report 112-126, Arizona Wallow Fire Recovery and Monitoring Act FEMA issued a federal disaster declaration.6FEMA. Arizona Wallow Fire FM-2915-AZ
Criminal Charges and Sentencing
Caleb and David Malboeuf were each charged with five federal misdemeanors: causing timber to burn, leaving a fire unattended and unextinguished, leaving a fire without completely extinguishing it, causing and failing to maintain control of a fire, and building a campfire without clearing surrounding flammable material. Each count carried a maximum penalty of six months in prison, a $5,000 fine, or both.1Tucson Sentinel. Wallow Fire Charges Filed Both men pleaded guilty.
On August 22, 2012, a U.S. Magistrate sentenced each cousin to 48 hours in jail, five years of probation, and 200 hours of community service. The judge declined to impose a fine so that any payments the men could make would go to restitution for homeowners who lost property. Prosecutor Patrick Schneider called the defendants “good people” who did not intend to start the fire.7KNAU. Two Sentenced for Starting Wallow Fire
The $3.7 Million Restitution Order
In November 2012, the court ordered the Malboeufs to pay $3,730,358.53 in restitution, jointly and severally. Uninsured victims came first in the payment order, with claims totaling about $300,000. Insurance companies, whose combined claims topped $3 million, were next. The U.S. Forest Service chose not to seek reimbursement for the roughly $79 million it had spent fighting the fire, though it reserved the right to pursue civil action. Arizona, the San Carlos Apache Tribe, and the White Mountain Apache Tribe were not included in the restitution order.8KPBS. Wallow Fire Starters Ordered to Pay Victims $3.7 Million
At the time of the order, an attorney for Caleb Malboeuf acknowledged that full repayment was unlikely given the cousins’ finances. In April 2017, Magistrate Judge David K. Duncan approved a resolution of the obligation. Caleb Malboeuf deposited $395,519.84 with the Clerk of the Court, and that payment constituted “full and final payment of all restitution ordered in this matter.” Both defendants’ probation ended on receipt of the funds.9CourtListener. United States v. Malboeuf, 3:11-mj-04234
Damage to Land, Water, and Health
About 16 percent of the burn area, or 86,115 acres, experienced high-severity burning, and another 14 percent (73,634 acres) burned at moderate severity.5GovInfo. Senate Report 112-126, Arizona Wallow Fire Recovery and Monitoring Act On the national forest, 58 percent of the landscape burned intensely, and tree mortality in those areas exceeded 50 percent.2Tucson Sentinel. Managing Forest Helped Stop Wallow Fire on Reservation
The fire also created water-repellent soil across an estimated 32,000 acres, meaning rainfall no longer absorbed properly. Post-fire peak flows were projected to reach 375 percent above pre-fire levels in heavy rain. About 1,924 miles of streams were flagged as flood risks, and 160 homes in Greer, Eagar, Springerville, and Alpine sat within mapped post-fire floodplains. Downstream reservoirs, including River Reservoir, Nelson Reservoir, and Luna Lake, faced threats from sediment and debris.10USDA Forest Service. Burned-Area Report, Wallow Fire
The fire’s smoke carried health effects well beyond the burn perimeter. A study in the Journal of Public Health Management and Practice examined emergency department visits in Albuquerque, New Mexico, during the smoke event and found that heavy exposure to fine particulate matter was linked to significant increases in respiratory and cardiovascular visits. Adults 65 and older showed a 73 percent increase in asthma-related visits during heavy smoke days.11PubMed. Health Outcomes Associated With Smoke Exposure in Albuquerque During the 2011 Wallow Fire
Why Tribal Lands Fared Better
The devastation on the national forest contrasted sharply with the lighter damage on neighboring tribal land. On the Fort Apache and San Carlos Apache reservations, tree mortality was about 10 percent, compared to over 50 percent on the Apache-Sitgreaves. Less than 3 percent of the burned land on Fort Apache showed high or moderate soil burn severity.12Bureau of Indian Affairs. Wallow Fire Fuels Treatment Effectiveness
Decades of aggressive forest management explain much of the gap. The Fort Apache Indian Reservation has been conducting large-scale prescribed burns since the 1950s, when forester Harold Weaver carried out a 50,000-acre controlled burn that reduced later wildfire occurrences by more than 90 percent compared to untreated land. More recent “Maverick” fuel treatments covering 13,378 acres between 2003 and 2009 were credited with helping to check the Wallow Fire’s advance. When the fire reached the treated tribal boundary, it dropped from a crown fire to a ground fire, letting firefighters set backfires and stop the spread. Incident Commander Dugger Hughes estimated that failing to stop the fire at the reservation boundary would have increased its size and cost by about 25 percent.12Bureau of Indian Affairs. Wallow Fire Fuels Treatment Effectiveness
Was the Wallow Fire Really Arizona’s Largest?
The Wallow Fire is officially recognized as the largest in Arizona’s recorded history, surpassing the 468,638-acre Rodeo-Chediski Fire of 2002.13KTAR. Here Are the Five Largest Wildfires in Arizona History A 2026 study published in Fire Ecology by researchers at the University of Colorado’s Cooperative Institute for Research in Environmental Sciences challenges that framing when stretched back beyond modern records.
Led by paleoecologist Chris Guiterman, the study analyzed 1,293 tree-ring fire scars from 160 trees on the Mogollon Plateau to reconstruct 375 years of fire history in the same landscape where the Wallow Fire burned. Fires in 1748, 1847, and 1851 were comparable in size and likely larger. Before 1900, fires exceeding 100,000 hectares (about 247,000 acres) occurred roughly every 20 years, though those older fires were generally lower in intensity, burning through the understory and allowing forests to recover.14CIRES. Was the Wallow Fire Arizona’s Biggest? New Research Says No A century of fire suppression changed that pattern. Total area burned has fallen 85 percent compared to the pre-1900 period, producing what the authors call a “cumulative fire deficit” exceeding 2 million hectares. The accumulated fuel makes modern fires, when they do break out, far more intense.15Springer. Guiterman et al., Fire Ecology (2026)