Police arrested more than 100 people as they broke up the Dolores Hill Bomb last July.
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It's an event where skateboarders race down the hill near Dolores Park.
RELATED: SFPD's bodycam video shows moments before 100+ people arrested, cited at skateboarding event
SFPD's bodycam video shows moments before Hill Bomb arrests
Four teens are suing the city.
They say their civil rights were violated when they were detained outside in the cold for hours without food or water.
RELATED: Protesters rally at SFPD station after dozens arrested at skateboarding event in Dolores Park
Protestors rally at SFPD station after dozens arrested at Dolores Park
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The city attorney's office says it's trying to get the cases dismissed.
The case heads to a judge on April 30.