Twenty-six-year-old Warren Sill from Ohio was filming a documentary on the kermode bears, a group of white-coated black bears, that inhabit the area.
Sill said he would be gone four or five days, but his parents say they haven't spoken to the man since July 4th.
Police in New Hazelton, B.C., say Sill's vehicle has been parked at the entrance of the Whiskey Creek Trail near Gull Creek since July 5th.
RCMP Const. Lesley Smith said authorities are most concerned that Sill is not "an avid outdoors man."
Smith said the search for Sill has been going on for three days with police, search and rescue crews and volunteers looking for the filmmaker.
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