MOUNT VERNON — A portion of Highway 9 was closed temporarily Thursday as fire crews fought a small wildfire burning east of Mount Vernon.
The Skagit Valley Herald reported that no homes were threatened and cool, damp weather was assisting firefighters.
The Big Rock fire is named for a 500-foot-high local landmark, which is popular spot for hiking and mountain bikers, although it is not technically open to the public.
The Washington Department of Natural Resources said the two-acre fire was burning in trees on rocky, steep terrain.
Fire officials have not determined the cause but suspect it might have started with a campfire.
To facilitate firefighting, Highway 9 was closed at times on Thursday. A helicopter dropped water on the hillside.