It's the second time this year L.A. streets have been transformed into a sea of bicyclists.
Six miles of streets in and around downtown were closed to vehicles and open to bicyclists, skateboarders, roller skaters and pedestrians.
The event began on Wilshire Boulevard from Grand Avenue in downtown Los Angeles to Fairfax Avenue in Hollywood.
The event's mission is to promote exercising and healthy living for all.
CicLAvia co-founder Aaron Paley said around 200,000 took part in the car-free event.
"This is a once in a lifetime thing, you can't just come down to these streets. There's so many cars and so much traffic, this is a great time to come down here, ride your bike and enjoy," said Phillip Batiste of Placentia.
A cyclist was hit by a car near the 4200 block of Wilshire Boulevard during Sunday's ride.
Firefighters say a driver plowed through cones blocking off the street.
The rider complained of some aches but declined medical care.
If you missed your chance to bike through the streets without any traffic, CycLAvia will run again on Oct. 6.