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U.S. Forest Service firefighters stand near flames at the Williams fire in the Angeles National Forest on Sept. 4, 2012 north of Glendora.
The massive fire which has been burning in the San Gabriel Mountains for five days has been 69 percent contained, says Angeles National Forest spokesman Nathan Judy.
Full containment is still not expected until next Thursday. While only one burned area remains, the terrain there is so rough that firefighters will need to be dropped in by helicopter.
Judy says they will then have to stay there for 48 to 72 hours, sleeping overnight.
The flames have consumed 4,180 acres and left several firefighters with minor injuries. That includes two on Thursday; one suffered a face laceration and the other, a shoulder injury.