BANNING, Calif. -

Firefighters continue to make slow but steady progress as they inch their way toward full containment of the Hathaway fire in the San Gorgonio Wilderness east of Banning.

At last report, the fire was 83 percent contained, having scorched 3,823 acres, the U.S. Forest Service reported.

The blaze broke out in the northern part of the Morongo Indian Reservation shortly before noon on June 9. Since then, 10 non-serious injuries have been reported involving fire personnel, according to the Forest Service.

The containment lines that crews have been carving around the blaze have steadily stretched in recent days; containment was at 63 percent on Sunday. The Forest Service projects full containment on June 25.

With no structures reported threatened by the blaze, 596 firefighters remained on the fire lines as of 6 Wednesday night.

The fire has been burning in a steep, remote area that is difficult to access. It has been fueled in part by dead trees -- the result of the 1999-2004 drought, plus bark beetle infestation.

The San Gorgonio Wilderness area, including trails, remains open.