As dusk settled Monday, firefighters had gained the upper hand on the Cinnamon Bear Fire southeast of Pagosa Springs.
Fire managers estimated that 70 percent of the fire, about 10 miles southeast of the city, would be contained, U.S. Forest Service spokeswoman Ann Bond said.
Managers said favorable conditions today could push them nearer full containment, Bond said.
The fire was estimated at 85 acres Monday, down from the 120 acres reported Saturday. Better mapping was credited for the new estimate.
The number of firefighters remained at the 78 sent from various fire agencies. One Type 1 and one Type 3 helicopter were being used.
During the weekend, single-engine air tankers limited the advance of the fire.
The Goblin Fire in the Animas Canyon in the San Juan National Forest north of Durango was going nowhere Monday. The fire grew only 2 acres overnight to 42 acres.
An ember from a Durango & Silverton Narrow Gauge Railroad locomotive is suspected in starting the fire.
Rocky terrain prevents an effective ground attack, Bond said. A helicopter was on standby, she said.