Arrived at the TH at 4:30pm. Gate is now open so it is now possible to park directly at the trailhead. 
This is obviously a very well-loved trail. No obstacles, not so much as a branch crossing the path. Very easy to follow all the way to the top. 
The heat made this more of a challenge than I was anticipating. Made it to the top in 1 hour 20 minutes with a fairly slow pace and plenty of water breaks. There is no bathroom at the trailhead, but there are composting toilets at the top at both the north and south viewpoints. 
I liked the north viewpoint a bit better as it had more views of the Olympics, but the South viewpoint is still worth walking to. It's only an extra 0.5 miles, and it gives you a better view of the sound. 
It was pretty hazy today so visibility wasn't perfect, but still a wonderful way to spend the warmest day of the year so far. Total was 5 miles, about 3.5 hours with 25lb pack and plenty of breaks.  

Glad I got to the top before the clouds moved in around 1:00.  Beautiful views made up for the steep, seemingly never-ending climb.  I went to both viewpoints - definitely worth it as they are so different.  A "camp robber" worked really hard at begging for my lunch but came up empty.  Trail in great shape - didn't even see any trash.  

Gate is open.  Trail is in great condition.  No snow at all.

Mount Walker trail is clear for spring hiking. The parking lot is still gated off, but enough of the dirt road is available to park 6-8 vehicles. Hiked the trail as part of a conditioning working out from 10:30am to 1pm. Fortunately the clouds kept me cool, but unfortunately clouds stifled any views.

Crowd: Approximately 25 people and 2 puppies seen throughout the hike.

"Far over the Misty Mountains cold
To dungeons deep and caverns old
We must away, ere break of day
To find our long forgotten gold
The pines were roaring on the height
The winds were moaning in the night
The fire was red, it flaming spread;
The trees like torches blazed with light
The wind was on the withered heath
But in the forest stirred no leaf:
There shadows lay be night or day
And dark things silent crept beneath
The wind went on from West to East;
All movement in the forest ceased
But shrill and harsh across the marsh
Its whistling voices were released
Farewell we call to hearth and hall!
Though wind may blow and rain may fall
We must away ere break of day
Far o'er the wood and mountain tall"

- Petter Hollens, inspired by J.R.R. Tolkien, The Hobbit