SAN FRANCISCO — Nearly three-dozen structures were destroyed in a massive Northern California wildfire that continues to spread more than a week after it started, officials said Sunday.According to preliminary figures, 10 residences and 22 outbuildings were lost in the King Fire as the structures were discovered in the White Meadows area of Pollock Pines, said Capt. Tom Piranio (pih-RAH’-nee-oh), a state fire spokesman.Assessment teams were headed back in the rugged, steep terrain to survey more damage, he said.“It has been very challenging to get access to those burn areas because there’s a lot of inaccessible terrain,” Piranio said. “We had to make sure it was safe enough to enter.”Smoky conditions from the fire also forced a last-minute cancellation of two popular Ironman events in nearby Lake Tahoe Sunday morning, Ironman operations manager Keats McGonigal said. About 3,000 athletes from around the world were expected to participate, but couldn’t due to poor air quality as the fire spread to the Tahoe National Forest northwest of Lake Tahoe over the weekend.The fast-moving blaze located about 60 miles east of Sacramento that started Sept. 13 grew to more than 128 square miles Saturday despite periods of rain overnight. A man charged with starting the fire, Wayne Allen Huntsman, 37, pleaded not guilty to arson Friday and remains in the El Dorado County jail on $10 million bail.