Police arrested 35 people during a monthly bike ride that attracts hundreds of cyclists, a day after a federal judge ruled that the "Critical Mass" event did not need a parade permit.
Most of the bicyclists were arrested on charges of disorderly conduct for blocking automobile traffic, police said.
The ride began Friday at Union Square Park and headed north on Park Avenue but eventually splintered into a few different groups. Police urged riders to stick to a specific route and passed out flyers warning that cyclists could be arrested for violating traffic rules.
Between 1,000 and 1,200 cyclists took part in the ride, said Leah Rorvig, a volunteer with the group Time's Up, which advocates the monthly event.