The Green River Natural Area encompasses three formerly separate parks as well as additional natural areas. However, only the former O'Grady Park access point has horse-suitable trails. The combination of the former park lands into the Natural Area designation allows for the better protection of salmon habitat. Accordingly, please keep horses out of the river to prevent the destruction of river-bottom spawning areas.
From the parking area at the O'Grady access point, follow the maintenance road for a mile down towards the river. Near the end of the road, trails branch to the left and right; the right one is a single out-and-back trail, while the left one has a couple of loops.
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O'Grady Access Point: From
164 (Auburn-Enumclaw Rd SE): go south on 164, turn left on SE
380th St, then right onto 160th Pl SE. This turns into SE 384th St.
Go a bit over a mile further, and turn left onto 188th Ave SE and
follow to the end.
From 169: going south on 169 toward
Enumclaw, turn right on SE 400th St (Krain-Wabash Rd) & go 3 miles.
Turn right again on 212th Ave SE, and when this takes a sharp left,
it turns into SE 384th St. After 1.5 miles, turn right onto 188th
Ave SE and follow to the end.
Length: 4+ miles
Surface: dirt
Share with: hikers, bicycles, dogs
Parking for: ~4 trailers
King County Natural Resource Lands:
http://www.kingcounty.gov/environment/waterandland/natural-lands/ecological/green-river.aspx
Map:
http://www.trailmeister.com/washington/ogrady/ogrady.htm