Green River Natural Area

This 922-acre natural area, along the Green River between Auburn and Black Diamond, is comprised of the former Metzler, O'Grady and Green River Waterway Parks. Enjoy walking, bicycling, studying nature, horseback riding, fishing and river running on a raft, inner tube or kayak.

getting there

  • O'Grady Public Access Point: 500 feet north of the intersection of SE 373rd St and 188th Ave SE in Auburn.
  • Metzler Public Access Point: The gravel road on the south side of SE Green Valley Rd 2 miles west of its intersection with 218th Ave.

about the natural area


"Steep valley walls and a broad valley floor combine to create rich mosaics of plant communities that characterize the natural area. Mixed forest and deciduous upland forests cover much of the valley wall, with several forested and scrub-shrub wetlands nestled in the benches. Gallery cottonwood forests, deciduous forests, meadows (old pasture/agricultural fields), and forested, scrub-shrub, and emergent wetlands are common on the valley bottom. Native plant installation and invasive plant control enhancement efforts have occurred along with streambed restoration projects focused on improving salmonid habitat. Several of these wetlands form the headwaters of short tributaries to the Green River. The lower reaches of the wall-based streams in this area are utilized for spawning by coho and chum, and rearing by chinook, coho, chum and winter steelhead. Cutthroat trout have also been reported."

  • Difficulty: Easy
  • Length: 7.0 mi
  • Elevation Gain: 500 ft
  • 200 ft
  • Land Manager: Green River Natural Area
  • Parking Permit Required: None
  • Recommended Party Size: 12
  • Maximum Party Size: 12
  • Maximum Route/Place Capacity: 12
  • USGS Auburn
  • USGS Black Diamond

Upcoming Activities

Day Hike - Green River Natural Area

Day Hiking Trip
Explore a newer King County park on seven miles of scenic wilderness trails along the
Difficulty: Easy
Sat, Dec 21, 2019
No Prerequisites
0 participants
Registration closes Dec 19
Tacoma Branch
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