Fire officials in Central Oregon say they're taking an indirect approach to fighting a wildfire burning 15 miles northwest of Sisters.

The Shadow Lake Fire so far has scorched more than 300 acres in the densely wooded Mt. Washington Wilderness area.

Instead of digging fire lines, crews will use existing roads and preexisting burn scars as barriers and wait for the flames to come to them.

Kris Eriksen is a fire information officer. She says fire managers came to their decision after performing a risk assessment of the situation.

"The odds of us going in with firefighters and then have to cut line all the way in, take care of all that dead and down, there's no safety zone, there's no escape routes, for really a very low probability of being successful, the decision was made that that was not a good choice in this particular instance," Eriksen said.

Ericksen says fire activity is expected to remain low though Friday before picking up again over Labor Day weekend. Forecasters are calling for temperatures as high as 90 degrees in Central Oregon.

Ericksen says that could accelerate the fire and smoke plumes could be visible from Sisters. She says smoke could also blow over the Big Lake Camp Area in the Willamette National Forest.

InciWeb info on Shadow Lake fire

Central Oregon Interagency Dispatch Center

National Interagency Fire Center