Containment of the Boulder Fire has been increased to 75% today. Size of the fire remains at 233 acres southeast of Mt. Hood on the Barlow Ranger District near Boulder Lake Trailhead. Northwest Team 10 Operations Section Chief Bert Thayer says mop-up objectives have been completed. Fire investigators are asking anyone who might have been in the area of the Boulder Lake Trailhead and Little Boulder Lake located off Forest Road 4880 on July 8 to come forward with any tips, photos, or videos as they try to determine the cause of the fire. Please submit any information that could assist fire investigation efforts to SM.FS.R6TipHotLine@usda.gov