2023-07-11, Enatai Beach Park, Bellevue, Washington, 20.jpg
Steven Pavlov · CC BY-SA 4.0

East Portal View–Mercer Slough, 3 beaches is a 12.5-mile out-and-back in Mercer Slough Nature Park near Mount Baker, WA. The route passes East Portal View (mile 0.1) and Luther Burbank Park Beach (mile 3) before reaching Mercer Slough at the turnaround, 6.2 miles in. It climbs 739 ft, with sections as steep as 17% grade, and is mostly paved. It scores 0/100 on the Ambleway Wildness scale, staying close to roads and developed areas.

Elevation

0 mi16 – 266 ft · steepest grade: 17%13.6 mi

Getting there

Trailhead: South Day Street 47.59032, -122.29127
Nearest town Mount Baker, WA

Directions

AMBLEWAYwww.ambleway.com

East Portal View–Mercer Slough, 3 beaches

12.5 mi · ▲ 739 ft · 4 hr 32 min

Elevation 17–267 ft

Out & Back · Mercer Slough Nature Park

Trailhead: South Day Street · 47.59032, -122.29127

Weather Jul 17: Overcast, high 70°F / low 56° · precip 0% · wind 5 mph · sunrise 5:30 AM · sunset 9:02 PM

Transit-accessible: 31st Avenue South & South Day Street stop 84 m from the trailhead · Drinking water at the trailhead · Parking lot at the trailhead

  1. Start at the trailhead, heading E.
  2. 50 ftTurn right onto Mount Baker Ridge Bicycle/Pedestrian Tunnel, heading E.
  3. 0.1 miPass East Portal View.
  4. 150 ftContinue straight onto I 90 Trail, heading SE.
  5. 1.6 miTurn left, heading E.
  6. 350 ftBear left, heading NE.
  7. 0.4 miSharp right, heading E.
  8. 0.1 miBear right, heading NE.
  9. 0.6 miPass Luther Burbank Park Beach.
  10. 500 ftBear right, heading SE.
  11. 300 ftTurn right, heading SE.
  12. 2.4 miTurn left onto Lake-to-Lake Trail, heading E.
  13. 0.7 miPass Mercer Slough.
  14. 500 ftTurn left, heading N.
  15. 150 ftTurn right onto Bellefields Loop Trail, heading N.
  16. 450 ftReach East Portal View, then turn around and head back the way you came.
  17. 400 ftTurn left, heading NW.
  18. 150 ftTurn right onto Lake-to-Lake Trail, heading N.
  19. 0.8 miTurn right onto I 90 Trail, heading S.
  20. 1.3 miBear right, heading N.
  21. 1.1 miBear right, heading NW.
  22. 50 ftTurn left, heading NW.
  23. 0.8 miTurn right, heading NW.
  24. 0.1 miTurn right, heading NW.
  25. 0.5 miBear left, heading NW.
  26. 1.8 miTurn left, heading W.
  27. 50 ftArrive back at the trailhead.

Each distance is the walk from the previous step. Tap a step for a map of its junction.

Trail surface

98% paved1% dirt1% gravel

Good to know

  • Transit-accessible: 31st Avenue South & South Day Street stop 84 m from the trailhead
  • Drinking water at the trailhead
  • Parking lot at the trailhead

Weather

OvercastTemperature 70°F56°
Precip0%Wind5 mphUV7Humidity52%
Rained 0.1″ yesterday
Hourly temperature
70°55°
Sunrise 5:30 AM12 AM3 AM9 AM12 PM3 PM6 PMSunset 9:02 PM
Sat 74°54°
Sun 79°55°
Mon 88°55°
Tue 89°61°
Wed 90°64°
Thu 90°66°

More from South Day Street Trailhead