ElevationAscent: 67' 21 m
Descent: -76' -23 m
High: 383' 117 m
Low: 307' 93 m
GradeAvg Grade: 3% (2°)
Max Grade: 8% (5°)
Popular runs nearby
Point Defiance Trail Race
10.3 mi 16.6 km • Point to Point • 1,102 ft Ascent 335.74 m Ascent
1.9 mi 3.1 km • Loop • 93 ft Ascent 28.34 m Ascent
The Bloedel Reserve
1.8 mi 2.8 km • Loop • 110 ft Ascent 33.38 m Ascent
Wilderness Peak Loop
3.7 mi 6.0 km • Loop • 1,243 ft Ascent 378.92 m Ascent
Cougar Mountain Series: Race #2 - 8.2 Loop
8.1 mi 13.0 km • Loop • 983 ft Ascent 299.61 m Ascent
Bridle Trails State Park - Outer Loop
4.4 mi 7.1 km • Loop • 231 ft Ascent 70.32 m Ascent
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“A former dirt road passing through the heart of Island Center, connecting to several routes.”— Brendan Ross
Dogs are not permitted in the Mukai or Meadowlake Pond areas but are allowed throughout the rest of the trail. They are required to remain "either leashed or under strict sight and voice control," according to local regulations.
Generally, visitors should elect to use the 188th Street Trailhead, as it has the most parking. Paper maps are available here and at the Mukai and Cemetery Trailheads.
Beginning from its southern end at the Cemetery Trailhead, Grinder starts on the other side of an always-closed vehicle gate. It is a flat, gravel single-lane road that was abandoned long ago as the County converted the area to a park. While in other areas Grinder might be considered a "nice" dirt road, the abundance of better foot trails throughout the island make this route pale in comparison.
Signs exist for many, but not all, of the intersecting trails Grinder passes as it goes. A brief descent follows the turnoff for The Gallops, after which Grinder crosses the calm Judd Creek. Middle Fork heads off to the north just after and is a good choice to connect to other area trails.
After this, it's a generally straight shot to the west. As it continues, Grinder slowly begins to taper, eventually leaving behind evidence of its origins as a road and appearing more like a traditional dirt doubletrack. The trail ends at a T intersection with Craig's Trail and Dump Run. The Vashon Recycling & Transfer Station is just visible through the trees ahead.
Animal life includes smaller woodland creatures and deer, but the biggest draw to Island Forest is the wide variety of birds, more than eighty species in all. The wetland areas around Mukai and Meadowlake Ponds draw bird watchers from around the region.
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Land Manager: King County, WA - Parks and Recreation