CHARLESTON, S.C. (WCIV) -- Some College of Charleston students spent Saturday morning on a scavenger hunt. But their hunt was not for treasure. It was for trash.The 11th Annual Dash for Trash started in Liberty Square at 10 a.m. The students had two hours to collect as much trash as they could before bringing it back to be scored.Each type of trash has a point value, organizers said, and the team with the most points won prizes ranging from gift cards to movie tickets. Prizes were also awarded for various categories such as "Most Unique.""Some of them know what they're getting into. They've done it year, after year, after year and they're ready to go. They have a strategy and a plan," said Jennifer Scales from Keep Charleston Beautiful. "And then others get out here and they don't really know what they're getting into and they say, 'Eww, it's litter. It's gross,' and as they get into it, it becomes a competition and they kind of warm up to the idea."Organizers said the most common type of trash found is cigarette butts. Last year, students collected more than 20 pounds of them from downtown.