It's year number six for the championship Round the Rock Stand Up Paddle (SUP) Race & EXPO event! The biggest SUP (only) race in the Pacific Northwest, will feature an endurance 13-mile race that will challenge participants in the flat waters of Lake Washington around scenic Mercer Island. The event is staged on the south shore of Seattle’s beautiful Seward Park, featuring the spectacular backdrop of Mount Rainier. The day also features a 3-1/2 mile race, a kids’ race and a team relay race, along with food, music, public SUP demos and prizes.