Mercer Slough Nature Park

NOTICE: Winters House: CLOSED due to Light Rail construction

PARKING:  As of July 31, 2017, the parking lots at the Winters House and Blueberry Farm are closed due to East Link light rail construction. Access to Mercer Slough Park and the trail system will remain open, and a new temporary parking lot near the South Bellevue Station site is be available for users. The new lot is for Mercer Slough Park users only; not commuters. Details can be found in Sound Transit’s July 25 Construction Alert.

Mercer Slough Environmental Education Center:

    1625 118th Ave. SE, 425-452-2565

MSEEC Community Room Rentals:

    1625 118th Avenue SE, 425-452-6914

Sweyolocken Boat Launch:

    3000 Bellevue Way SE (non-motorized boats)

Bellefields Trailhead:

    1905 118th Ave. SE


Parks & Community Services 450 110th Avenue NE or PO Box 90012Bellevue, WA 98009-9012



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Mercer Slough

7+ miles trails, visitors center, environmental education center, picnic areas, waterfront, canoe launch, blueberry farm, and restrooms. Just minutes from downtown, the Mercer Slough Nature Park is the largest of Lake Washington’s remaining fresh water wetlands and is one of Bellevue’s largest parks. Explore over 320 acres of wildlife habitat, agriculture, and freshwater wetland ecosystems on 7+ miles of trails including a unique canoe trail. The blueberry farm sells fresh seasonal produce. The beautifully restored historic Winters House (closed during construction) is Bellevue’s only public building on the National Historic Register. The Mercer Slough Environmental Education Center is a partnership with the Pacific Science Center focusing on freshwater wetland ecology, provides a park visitor center (open daily from 10 a.m. to 4 p.m.) and offers programs for adults, youth and families.

Free Guided Ranger Walks

Selected Sundays, 2 p.m. - please call 425-452-2565 for info and to RSVP.

Map of Enatai Beach Park and Mercer Slough Nature Park Water Trail 

REI offers canoe and kayak rentals at Enatai Beach Park.

Driving and Parking Directions 

Parking & Entry Points:

The entry points and parking spaces are located at Sweyolocken Boat Launch; Bellefields Trailhead; Mercer Slough Environmental Education Center.

Sweylocken Boat Launch Directions:

From I-90

Take Bellevue Way exit north. Sweyolocken is on the right along Bellevue Way before 112th Avenue Southeast.

Mercer Slough Environmental Education Center & Bellefields Trailhead Directions:

From I-405

  • Take Exit 12 for SE 8th Street

  • Travel west on Southeast Eighth Street

  • Take immediate left onto 118th Avenue Southeast, heading south

  • Travel about a half mile

  • Just before the first MSEEC sign (in light blue), take the first right into the parking lot.

  • Walk the path to the front of the buildings.

From I-90

  • Take Exit 9 for Bellevue Way. Continue for one mile.

  • Veer right onto 112th Avenue Southeast.

  • Take a right onto Southeast Eighth Street.

  • Take a right onto 118th Avenue Southeast.

  • Travel about a half mile.

  • Just before the first MSEEC sign (in light blue), take the first right into the parking lot.

  • Walk the path to the front of the buildings.

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