The road was real bumpy but manageable in just about any car.  There is a stream ford that I would recommend a higher clearance vehicle for but we saw some sedans that made it the whole way to the trailhead.

I'll break this down according to the different trails listed on WTA:

Squaw Lake

The trail to Squaw lake was a bit wet requiring a bit of rock hopping just after the trailhead, but nothing terrible.  There were a few blowdowns but nothing to hard to surmount (and we were carrying 40+ lb packs with skis sticking off of them...). The area around the lake is fully melted out and looks like it offers some awesome camping.

Cathedral Rock

After you pass Squaw lake the trail begins to climb further and is in a bit worse condition.  More water flowing down the trail and a couple of blowdowns requiring searching for the trail on the other side.  Again nothing horrendous.  In addition there are intermittent patches of snow on the trail with some running water. I post-holed through one of them.  Stuff to watch out for but not overly dangerous.

Peggy's Pond

Past the turn off to Peggy's pond the trail becomes less of a trail and requires a bit of easy scrambling and screen traverses. Few Snow patches left but easy enough to pass in trail runners.  The pond itself is not fully melted out but it's getting there.  Plenty of snow surrounding too, a few dry tent pads but not many.  Also, LOTS OF BUGS.

Mount Daniel

Our goal was climbing and skiing Mount Daniel, so we pushed past the pond to bivy high on the mountain (and avoid the bugs).  We took the Hyas Creek 'glacier' drainage and ascended a snow couloir below the east summit.  It will probably still go for awhile.  Our original plan was to pass under the spire on the North East ridge of the East peak to gain the Daniel Glacier but there were cracks that would've made the skiing annoying.  Instead we headed up the standard route to the summit of the east peak.  We found a flat spot ~200ft below the summit to bivy on and there were even 2 other skiers bivied on the summit.  We enjoyed a run in the evening off the east peak summit for ~600 ft.   The sunset/sunrise from high on the mountain was spectacular.  The next morning we traverse to the middle and west peaks using crampons and axes on some steep snow traverses and then booting the snow & screen once it warmed up.  After hanging out on the west (true) summit we skied a few hundred feet down the east face and then headed back over to the Daniel Glacier for the money run of the day, 1500ft of uninterrupted fall line skiing with 0 crevasses (we had glacier gear to be safe but it was chill).  After that we headed SE up a couloir off the east ridge of Daniel. From the top we were able to ski our up track more or less back to Peggy's Pond.

Stats: 17mi, ~7k gain ~4k of skiing

GPS track linked below

Fastpacking overnight: Ran from the Deception Creek TH through Deception Pass, down to the Deception Pass TH, then up the Cathedral Rock trail to Squaw Lake. Slept, then ran up to Cathedral Pass/Rock on back to the Deception Creek TH by reverse route.

Deception Creek trail was nicely maintained with some overgrowth in areas but nothing unreasonable given the time of year. Once you pass Fischer Creek, the Deception Creek will have to be forded (the foot log is out.) This is not a difficult ford so kick of your shoes and enjoy the refreshing water. Beyond this the trail will get a bit trickier as you begin to climb up towards the pass. There are several stream crossings which are initlly easy enough just walking along a log of skipping rocks. But as you reach the section where you criss cross Deception creek, you will have to ford at times. Further up the creek you will run into snow patches as the sun hasn't fully baked out this area due to the creek valley shade. These sections are pretty self-evident though you will have to pay attention in order to not lose the trail (a couple times it may actually lead down to cross the creek although you can't see that routing due to the snow patch.) Some foot traffic may reveal the way but be sure not to get too reliant on that (not too many people were heading this far up.) Once you finish the creek crossings you will come upon a mountain meadow which is very quaint though there'll be some muddy/wet areas up here due to recent snow melt. Again some snow patches but easier to sort out direction wise. The Pass itself is fully snow covered with patches of clear spots. Still, it seems relatively reasonable snow wise and is easy to navigate. Once through the pass, the snow patches quickly lessen as you head down towards Hyas Lake via Deception Pass trail (I think the angle here allowed for a bit more sun bake.) The trail does have a few downed trees to hurdle but is well maintained. Down towards Hyas Lake there are couple creeks to skip over but this section of trail is very nice and you'll notice how accessible Hyas Lake is to novice hikers (a beautiful spot to reach.) BUt beware: bugs! With some nearby water and marshy zones, there were a fair amount of mosquitoes out for blood. I took on up Cathedral Rock trail from here.

Cathedral Rock trail is a steady incline but well maintained with just a few downed trees to hurdle (and simple ones at that.) Once at Squaw Lake, I was surprised to find the lack of snow since it's at 4800' but this allowedfor a beautiful campsite. But, alas, again: bugs! Be sure to have head to toe coverage in this zone if your staying for the evening hours because nearby wet areas provide a nice zone for mosquitoes. I stayed the ngiht along Squaw Lake.

In the morning, I took off for a closer look at Cathedral Rock and to check out Cathedral Pass. After some climbing up from Squaw Lake there will be some snow patches then a bit more of a snow field to cross. This is possible with your ordinary boots (I had on my trail runners) and the route is very noticeable. Several folks use this route to ski tour so plenty of feet mark the way to Cathedral Pass. Once at the Pass, it is surprisingly less snowy despite being up at 5600'. The views are beautiful as you can look across the Snoqualmie region.

Naturally, I reverse ran this route (I decided against the PCT return route since the river crossing would be potentially gnarly and some snow questions lingered in my mind: I wanted to charge it on that return trip.)

Happy trails!

I "ran" the Squaw Lake/Cathedral Peak/Deception Pass/Hyas Lake loop. I was probably a bit eager, because this route is way more snow-covered than I expected. Wait a month if you want to avoid snow and tricky routefinding. I was significantly off route twice because of the snow, and many times I almost lost the trail. I hit snow at the turn-off to Waptus Lake (4500'), and was in significant snow for several miles. Coming off Deception Pass the snow level appeared to be a bit lower. 

The biggest hazard though was the creek crossing between Cathedral Rock and Deception Pass. The hot day undoubtedly unleashed the flood waters, but it was a gnarly crossing. Where I could get across, my dog couldn't; where she could get across I couldn't assist without getting navel deep in the water. We made it, finally, but it was borderline irresponsible to do that crossing. The rest of the PCT to Deception Pass was mostly clear (though overgrown and in bloom). Hit a few dicey snow-slide patches, and the stream crossing at the turn to Deception Pass was just past a massive avalanche path so again wayfinding was tricky. 

I'm not convinced I made it all the way to Deception Pass - I think I dived off toward Hyas a bit earlier. Eventually re-found the trail and the rest of the way out was smooth sailing, aside from a few swollen creeks that will definitely get your boots wet. 

Between Deception Pass and the trailhead I saw maybe a dozen parties of backpackers, so I guess I wasn't alone in being eager. All told, I covered around 14 miles, probably a third of that where I could actually run, and finished the loop in 4  1/2 hours. Hikers should probably allow a couple more hours.

Road conditions: 

This is a nasty road start to finish, but things get really exciting at Scatter Creek (no bridge), and a high-clearance vehicle is highly recommended. Almost immediately after the creek you hit a large puddle/pond to cross, and then a wash-out to detour around. Once you've navigated that trifecta, it's just more garden-variety road nastiness to the trailhead. Count on at least an hour of travel from Roslyn to trailhead. 

The road: FS 4330 has a number of potholes which can be managed by speed (i.e. driving slowly, with patience); the crossing at Scatter Creek however isn't recommended without high clearance. The water level in one spot is at least 10-12 inches and there's another bit of standing water just beyond Scatter Creek that's definitely 12 inches deep. We were able to clear it in our Subaru Forester & Crosstrek and saw other SUVs and trucks - be careful.

The trail: the trail up to Squaw Lake had a few blow downs that are simple enough to get up and over or skirt around and only the last half mile has very intermittent snow. The toilet is not yet operable. The campsite was great!! Our night there was minimally buggy but by morning those skeeters (aka mosquitoes) were starved!! Pack your bug repellent.

Above Squaw Lake, up to Cathedral Pass still has at least 18-inches of snow. It's melting but still requires navigation support as the trail is covered completely.