Payson Ranger District officials predict the Promontory Fire will be fully contained by today (Friday).
As of Thursday morning, the blaze had consumed 285 to 300 acres, but the rate of spread had slowed. Crews had nearly completed sealing off the north, east and south flanks, and were concentrating on tying off the western flank.
The human-caused fire started early Sunday morning north of Christopher Creek and spread to the top of the Mogollon Rim by Sunday evening.
Some media outlets have broadcast a story about a hunter who allegedly started the fire after breaking a leg and then crawled four or five miles to alert authorities.
Gary Roberts, Payson Ranger District Fire Prevention Officer, said accurate information about the circumstances relating to the origin of the fire will be released by the U.S. District Attorney's Office on Monday.
"They haven't finished the investigation," Roberts said. "But you'd have to be Hercules to (crawl four or five miles) in that sort of country.
"If a person had to do that, it would be more like a tenth to a quarter of a mile."
The fire has caused a special area closure roughly north of Highway 260 to the top of the Mogollon Rim.