Seattle Milk Carton Derby 2024. Dozens of cardboard mariners manned 75 boats floated on milk cartons, showcasing their backyard naval engineering and creative flair, at saturday's annual. Nearly 100 colorful milk carton boats of all shapes and design compete on the waters of green lake for fantastic prizes and bragging rights.

Dozens of cardboard mariners manned 75 boats floated on milk cartons, showcasing their backyard naval engineering and creative flair, at saturday’s annual. You don’t have to be a sailor to have fun at.