Canoe The Mercer Slough: Pre-registration and prior canoeing experience is required. Explore the beautiful Mercer Slough Nature Park by water and see how this amazing wetland ecosystem functions. Trip begins and ends at Enatai Beach Park. Participants are required to paddle the entire distance of 4 miles. Restrooms will not be available while on the water. Up to 3 people per canoe. Please dress for the weather. Ages 5+ only. Children and youth must have at least 1 adult present for every 2 children or youth. Participants must arrive in time for the safety talk to participate. Preregister online (search for keyword "canoe" at the link below) and call 425-452-2565 with any questions.