Mercer Slough & Lake-to-Lake Trail is a 5.7-mile out-and-back in Mercer Slough Nature Park near Factoria, WA. The route reaches Mercer Slough. It is mostly level, with 142 ft of elevation gain, and mostly paved. It scores 0/100 on the Ambleway Wildness scale: paved and peopled.
Elevation
0 mi16 – 118 ft6.4 mi
Getting there
Trailhead: Factoria Trail 47.57748, -122.17358
Nearest town Factoria, WA
Directions
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Mercer Slough & Lake-to-Lake Trail
5.7 mi · ▲ 142 ft · 1 hr 58 min
Elevation 16–119 ft
Out & Back · Mercer Slough Nature Park
Trailhead: Factoria Trail · 47.57748, -122.17358
Weather Aug 4: Clear, high 77°F / low 52° · precip 0% · wind 3 mph · sunrise 5:50 AM · sunset 8:42 PM
Transit-accessible: Factoria Blvd SE & SE 38th St stop 299 m from the trailhead · Parking lot at the trailhead
- Start on Factoria Trail, heading N.
- 0.2 miSharp left onto I 90 Trail, heading NE.
- 0.5 miContinue straight onto Lake-to-Lake Trail, heading N.
- 0.8 miTurn left, heading N.
- 150 ftTurn left onto Bellefields Loop Trail, heading N.
- 500 ftPass Mercer Slough.
- 500 ftTurn left, heading SW.
- 0.1 miSharp right onto Heritage Loop, heading S.
- 0.5 miBear left, heading S.
- 50 ftSharp right, heading SW.
- 0.6 miBear left, heading NE.
- 0.1 miReach Mercer Slough, then turn around and head back the way you came.
- 0.1 miBear right, heading S.
- 0.6 miSharp left, heading S.
- 50 ftBear right onto Heritage Trail, heading S.
- 0.5 miSharp left, heading S.
- 0.1 miTurn right onto Bellefields Loop Trail, heading S.
- 0.2 miTurn right, heading N.
- 150 ftTurn right onto Lake-to-Lake Trail, heading NW.
- 0.8 miContinue straight onto I 90 Trail, heading S.
- 0.5 miSharp right onto Factoria Trail, heading E.
- 50 ftBear left, heading E.
- 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
75% paved15% dirt9% boardwalk1% gravel
Weather
ClearTemperature 77°F52°
Precip0%Wind3 mphUV7Humidity65%
Hourly temperature
80°50°
Sunrise 5:50 AM12 AM3 AM9 AM12 PM3 PM6 PMSunset 8:42 PM
Tue
85°58°
Wed
90°61°
Thu
94°60°
Fri
88°59°
Sat
85°57°
Sun
84°58°
Sunset
The best sunset spot on this hike is 0.0 mi in (~1 min). Leave by 8:21 PM for the 8:42 PM sunset. Back at your car by 8:58 PM — 20 min before dark.
Good to know
- Transit-accessible: Factoria Blvd SE & SE 38th St stop 299 m from the trailhead
- Parking lot at the trailhead
Other ways to reach this destination
More from Factoria Trail Trailhead
- Lake-to-Lake Viewpoint & Lake-to-Lake Trail 3.4 mi · ▲ 255 ft
- Gallager Hill Open Space–Lake Washington, 3 lakes 4.1 mi · ▲ 200 ft
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Hikes near Factoria, Washington