ANCHORAGE, Alaska -

Alaska State Troopers are searching for a missing 31-year-old survivalist from Wisconsin who set out alone in the Alaska wilderness in late September.

Thomas Seibold, of Three Lakes, Wis., is described as an experienced outdoorsman who works as an instructor at the Talking Drum Outdoor School. He has camped extensively during winters.

The Anchorage Daily News said Seibold had planned to stay in the northwest Alaska backcountry through October and had booked a flight home to Wisconsin on Nov. 15.

Troopers spokeswoman Beth Ipsen said Seibold didn't make the flight.

Tamarack Song, director of the Talking Drum Outdoor School, said Seibold traveled to Alaska in June, staying first at an Alaska Native fish camp in Southeast Alaska before heading north.