Beautiful! Frosty cold and nice leaves. A few spots on the trails were wet and muddy but mostly they were in great shape. The access road was without issue, except the gate was closed a couple miles from the river. Beware of much horse poop throughout.

I have lived in South King County for over 30 years but only recently discovered the Green River Natural Area located between Auburn and Flaming Geyser State Park.  Three trailheads provide access to this area.  I chose to check out the two that are located off of Green Valley Road.  The Doreen Johnson Conservation Area has parking at the side of the road (room for about four cars). No toilet or picnic facilities. I took a wide footpath (the right of a "Y") and enjoyed the swish and crunch of fall leaves as I walked about .2 miles to the Green River.  The river was calm and peaceful.  After returning to the"Y" I walked down an equally-wide path to the left which eventually ended at about .25 miles. 

I drove east about two miles to the Metzler access point at 18729 SE Green Valley Road. This has a parking lot with about 20 spaces plus a portable toilet and a picnic table.  The path to the river includes a boardwalk and a bridge that looks fairly new.  Sadly, the river at this location is a salmon graveyard - dead fish covered the river bed as far as I could see - I'm guessing the remnants of spawning season.

Neither trailhead offers challenging hikes but are fine if you just want to stretch your legs or bring your dog for a walk. The third GRNA access at O'Grady offers more miles of trails. I recommend getting a map of the area from King County Parks.

What a great day for a WTA work party! 13 of us met the staff of King County Parks to describe our projects for the day. My work group enjoyed improving drainage issues along 2 miles of the Three Bridges Trail and the Northern half of the Stevensonville  Loop Trail. Even though it has rained many times this week, the trail was relatively dry. The first wildflowers are starting to open and the blooming trillium was the star of the show. #MemberAppreciation

The trail is muddy in several places, but that is to be expected this time of year. 

There are several trails in the area, and not all interconnect to the main trail. 

Parking area is small, and it is a school bus turn around, so on weekdays you may want to consider that. 

After I sent the trip report below to the friend who accompanied me, she said her version of a trip report would have simply read "early spring weather, sun, blue sky, nicely empty, beautiful trees, picturesque river and a nice easy walk." So I'm including her report as a tl;dr version of the below.

I've been eyeing this hike for a while, but today was my first visit. It was really lovely - the weather helped; it only drizzled on us when we were within five minutes of the car - and we only saw one other person all day. Definitely a great option for a day when the weather forecast was a bit iffy. I see no trip reports since November, so I'm just chiming in with a handful of quick notes:

• We took the Hop Craze trail on the way down ("Hop Craze" according to the sign on-site, "Hop Trail" according to the King County map WTA links to) and just walked back up the service road on our way up. There appears to be some trail construction happening inside the area encircled by these two trails, judging by the trucks parked at their intersection and a sign informing us of the same. If anyone knows what they're up to in there, I'd be curious to know - my best guess is they are trying to cut a trail down from the big access road switchback but I don't see why that would be worth the effort.
• Both King County's online map and the maps etched on wooden trailhead signs throughout the park suggest there is river access just beyond the picnic area/clearing described in WTA's description of this hike. There is a permanent sign at that intersection indicating the trail is closed, and directing trail users to the Potter's Trail or the Miner's Trail for river access.
• Speaking of the Miner's Trail - WTA's description for this hike is very specifically an in-and-out adventure along the Potter's Trail. Including the Hop/Craze trail, it sticks to trails to the east of the access road. I do not see any official WTA trail entry/description for the Miner's Trail (or any other other trails to the west of the access road), but that might be well worth an entry! I look forward to getting back down there myself to find out.