Officials say the fire is around one hectare in size and is about 1,500 metres from the nearest homes, none of which have been evacuated.
Fire information officer Donna MacPherson says crews arrived on scene at around dawn, and were able to get a hold on the fire's growth late Sunday afternoon.
"Our crews are working hard on it. They've gotten down to the ground and are able to get directly onto the fire," she said.
"We've got 21 crew people ... [and] three helicopters that are bucketing from the air to cool it down."
MacPherson said anyone planning to hike in the backcountry should avoid the area.
Stave Lake fire
Meanwhile, crews are also battling a a small blaze just west of Stave Lake in Mission.
The 1.5-hectare fire was reported Sunday morning at Sayers Lake.
Officials say the fire was probably started by a person, although the exact cause is not yet known.
Air tankers are working to establish a perimeter of retardant around the blaze, which is not threatening any homes.
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