The Lewis & Clark County Sheriff's Office said in a Facebook post that 17-year-old Jade Hoff was last seen on May 25 in Helena.
According to the post, Jade is 5 feet, 11 inches, 135 lbs, with brown/blonde hair and hazel eyes.
Jade was reportedly on her way to Bozeman with friends and possibly headed to Yellowstone. She was wearing a black tank top and green pants when seen last.
Anyone who has seen Jade or knows her location is asked to contact Deputy James Coppola at 447-8235, option 1.