Firefighters expect to have a wildfire burning near the city of Rifle about 70 percent contained by tonight.
Full containment is expected by tomorrow evening.
All evacuations forced by the 830-acre fire have been lifted as calm wind is allowing crews to make rapid progress against the fire.
Federal Bureau of Land Management spokesman David Boyd says about 140 firefighters supported by two helicopters and 30 fire engines spent today digging fire lines.
While 50 homes had been ordered evacuated after the fire was reported Thursday, all evacuation orders are now lifted.
Authorities believe the fire was started by someone, but they aren't saying if the fire was started on purpose or by accident.
Early reports Thursday pegged the fire at 1300 acres, but better aerial mapping today shows the blaze burned about 830 acres, about 1.3 square miles.