(Multnomah County, OR)  --  A 15-year-old girl who had disappeared after going out on a nighttime hike is back home with her family.  "The Oregonian" reports the teen was reunited with family members shortly after midnight.  She had gone for a hike in the woods above Multnomah Falls around 6:50 yesterday evening, and was reported missing when she didn't return as scheduled.  The Multnomah County Sheriff's Office Trail Hornets, who conducted the search, found the teen at the Wahkeena Falls junction.