So far, nobody has been able to deter Hank, said Peter Tira, a spokesman for the California Department of Fish and Wildlife. Department officials and the local police have tried to “haze” the bear with paintballs, bean bags, sirens and Tasers, but he is too drawn to humans and their food to stay away for long.

“It’s easier to find leftover pizza than to go in the forest,” Mr. Tira said on Sunday.

Residents have called the police about Hank more than 100 times since July as he continues to rampage through Tahoe Keys, a gated community about 190 miles northeast of San Francisco.

Now the authorities are trying to trap Hank and possibly euthanize him.

“This is a bear that has lost all fear of people,” Mr. Tira said. “It’s a potentially dangerous situation.”