Sections of highways 28, 89 and 267 will be closed Sunday as thousands of athletes compete in Ironman Lake Tahoe.

More than 2,500 athletes are registered to compete in the 2.4-mile swim, 112-mile bike ride and 26.2-mile run at more than 6,000 feet above sea level.

Race officials will decide that morning if the event is a-go based on the air quality from the King Fire.

Highway 28 is scheduled to be closed in both directions from Fox Street to the junction with Highway 267 from 5:30-9:30am.

Northbound Highway 89 will be closed from Fairway Drive in Tahoe City to Squaw Valley Road from 7am-5:30pm and southbound Highway 267 will be closed from Northstar Boulevard to Kingswood/Commonwealth Drive in Kings Beach from 7:30am-4pm.

The Interstate 80 eastbound off-ramp to Highway 89/267 (Exit 188B) and the Highway 89 on-ramp to westbound I-80 will be closed from 6:30am-3:30pm.

Several residential street intersections with highways 28 and 267 in Kings Beach also will be closed. The CHP will be conducting traffic control at all closure locations.