The homemade rafts take off from the southwest corner of Green Lake, near the Aqua Theater and the Green Lake Small Craft Center (5900 West Green Lake Way N). The rafts’ primary floatation must be dependent upon milk cartons.
Registration for the event opens at seafair.com/milkcartonderby on Friday, April 1.
“You have a choice of building for speed or building for style,” reads a Seafair Facebook page with building tips. ”Speed boats compete in races for which the main prize is usually a trophy. Style boats often compete for prizes.”
Full rules can be found here.