Organizers say they collected 680 guns during the four hour event, including illegal guns and sawed-off shotguns. The event was sponsored by San Mateo County Sheriff Greg Munks, Supervisor Adrienne Tissier and Congresswoman Jackie Speier.
One woman tells ABC7 News she waited almost two hours to turn in a rifle.
"We gotta stop the violence," Redwood City resident Marquerite Olvera said. "This is crazy what's happening, you know, it's gotta stop. We gotta try to help each other. It's just gotta stop."
Speier added, "I think we've all done a lot of soul searching since Newtown. I think everyone is thinking long and hard whether or not we need guns in our lives."
People received up to $200 for their guns, with a total of $53,000 in donations to the program exchanged for the weapons.