Sunday's 14th annual Herbalife Triathlon Los Angeles will force drivers in the Venice, Mid-City and Koreatown areas to use freeways to bypass closed streets.
Westsiders will need to take the 405 Freeway to get around the closure of Venice Boulevard from Pacific Avenue to Fairfax Avenue.
Drivers affected by the closure of Olympic Boulevard from Fairfax Avenue to Figueroa Street are advised to use the 10 Freeway to the 405 Freeway or to downtown interchanges to go north or south.
In downtown Los Angeles, drivers should go to First Street or 12th Street to avoid the closures.
With cyclists reaching speeds up to 35 mph, there are no crossing points along the course, "a mandate from the city" government because of safety issues, race director Jack Caress told City News Service.
The course's cycling and running portions have been divided into three sectors, with streets closing and opening in waves as the competitors move from Venice toward downtown.
The first sector consists of Venice Boulevard from Pacific Avenue to Fairfax Avenue and Fairfax Avenue from Venice Boulevard to Olympic Boulevard.
Closures will begin in Venice at 6:30 a.m., where streets are expected to be reopened at approximately 9:30 a.m., Caress said.
Venice Boulevard is expected to be reopened at Robertson Boulevard around 10 a.m., Caress said.
Olympic Boulevard will be closed at Fairfax Avenue at 6:45 a.m. It will be reopened in Koreatown at approximately 11 a.m., Caress said.
Downtown closures will begin at 6:30 a.m. because of a 5-kilometer run associated with the triathlon that will begin at 6:50 a.m. Most of the streets downtown will be open around 1 p.m., Caress said..
To drivers angered by the street closures, Caress stressed the event's economic benefits, including tax revenue, money raised for charities and the health benefits for the competitors.
Organizers expect a field of approximately 2,500 from 17 nations, including the race's first competitors from Croatia, Ecuador and Indonesia, and 21 states.
The triathlon will begin at 6:50 a.m. with the swimming portion off Venice Beach.
There are five participation options.
About 1,100 people have chosen the Olympic course, which consists of a 1,500-meter swim off Venice Beach, followed by a 40-kilometer (24.8-mile) bicycle segment to L.A. Live and concluding with a 10-kilometer (6.2-mile) run through downtown Los Angeles.
Approximately 625 will race on the sprint course, swimming four-tenths of a mile, cycling 14.1 miles and running 3.1 miles.
About 600 people have entered the 5-kilometer run through downtown Los Angeles.
The other participation options are taking part only in the cycling portion or forming a three-person relay team.
The Olympic distance bicycle course will go along Venice Boulevard for seven miles to Fairfax Avenue, where it will head north to Olympic Boulevard.
The competitors will continue on Olympic Boulevard through Koreatown to L.A. Live Way, where they will reverse direction and head just more than five miles west to Spaulding Avenue, where they will again reverse directions, heading east to the intersection of Flower and 11th streets.
The running course begins at Figueroa and 11th streets, heads east on 11th Street to Grand Avenue, north on Grand Avenue to the Second Street, then back south to 11th and Figueroa streets, where a second lap to and from Second Street will begin.
The finish line is at L.A. Live.
The professional field consists of 11 men from six nations and six women from five nations. The men's and women's winners will each receive $3,000 and the second-place finishers $1,000.