Boulder fire crews have contained a small lightning-strike fire on the north slope of Flagstaff Mountain, according to officials.

Dispatchers began receiving calls at around 12:30 p.m. of smoke coming from the Flagstaff area.

Crews who responded to the scene reported the blaze to be about one-tenth of an acre in size, just south of Boulder Canyon, according to Boulder Fire Department spokeswoman Kim Kobel. Crews on the scene referred to the fire as "smoldering and creeping," according to police radio traffic.

Kobel earlier this afternoon said crews had to hike to the fire but hoped to have it quickly contained once they reached it. 

Just after 4:50 p.m., Kobel announced over the Boulder Police Department's Twitter account that crews had contained the small blaze and were leaving the scene.

She wrote that crews will return to the scene Wednesday to ensure it is safe.

The Flagstaff summit area was closed while crews used it as a staging area.

Officials believe the fire was started by a lightning strike but do not know how long it has been burning.

Contact Camera Staff Writer Mitchell Byars at 303-473-1329, or