Denver biologist Dale Brownlow missing in Helena National Forest in Montana

HELENA, Mont. - Officials in Lewis and Clark County in western Montana continued their search Saturday for a Denver man whose car has been parked at a trailhead for about two weeks.

Sheriff Leo Dutton told the Independent Record that a helicopter will be used in the search for 52-year-old Dale Brownlow, a wildlife biologist from Denver.

Authorities say Brownlow had been living at a hotel in Helena for at least a month before traveling to the Hunter's Gulch area leading into the Helena National Forest.

Authorities say he didn't check out of the hotel and told no one about his plans. He was last seen about two weeks ago.

Dutton said the search didn't start until Thursday because Brownlow is known to spend extended periods of time camping in the wilderness.