Step by sooty step, one burning stomp-hole at a time. This is the grind for firefighters working 24 hours on, 24 off.
"Most of the night, we're walking side-by-side through the edge of the burn, looking for any smoke," said Scott Witt, a Cal Fire Division Leader.
For Sacramento Metro firefighters and nearly 8,000 others, this is what containment means.
"At the end you get a chance to wash the dust off, and crack the boots open," Witt said.
It's not uncommon to find crews who have been working wildfires all season- who have come here directly from one of the state's other burns.
They are starting to turn the corner on the King Fire; this line has stabilized and evacuated residents of Swansboro have been able to return home.
But favorable winds on one side mean tough times on another front.
Earlier at base camp, they scrambled to get support on the Eastern Side on the burn.
"Firefighters have been working very aggressively to get some containment on that eastern portion. But these winds are definitely testing those lines," said Dana Walsh with the US Forest Service.