Officials at Grand Canyon National Park say the body of a Tygh Valley man who fell inside the park has been recovered.  A National Park Service press release says 48-year-old David Colburn fell 50 feet Saturday afternoon while hiking in the Deer Creek Narrows.  Colburn was on a group river trip.  National Park Service search and rescue teams couldn’t locate him until Sunday because of the terrain and darkness. Colburn’s body was flown by helicopter to the South Rim of the Canyon.  The Coconino County Medical Examiner’s Office will assist in determining the official cause of death.  KTAR Radio in Phoenix reports hikers and river rafters are known to traverse a narrow canyon around Deer Creek Falls.  The narrows are 136 miles downriver from Lees Ferry, where river rafting trips typically start from.