Rating:  5 of 5 stars!
My opinions:  This is a fantastic hike!  Views were awesome! Wildflowers were nice—flock, lilies and pretty white flowers.  In past years, I have been with acres of wildflowers in bloom, but I think I was too early for this abundant bloom.  Still, there were pretty flowers.  This is such a wonderful hike on a sunny day. 
There is snow the last ½ mile, when you go to the backside of the mountain.  We made it though the snow without YakTraxs.  I’m glad I had poles.
There are a lot of people doing this hike!  Crowded on a Sunday, but still worth going!
The hike is moderate, probably for beginners who are in decent shape, with incredible views from the parking lot and all the way up!  I think there are better views here than Mt Pilchuck, but this hike is much easier.  Most of the elevation gain is at the beginning, so once you get to what it looks like is the top, there is still more to go, but the elevation gain is much easier.
I highly recommend hiking poles—especially for the switch-back turns and on the snow.
Sauk Mountain is a longer drive from the Seattle area, but worth the drive!  You can also combine this hike with Baker Hot Springs, to get the most out of your trip north (but the road has a lot of very bad pot-holes).
Parking & Road Conditions: The road has lots of pot-holes, but if you go slowly, they aren’t horrible.  I’d suggest an SUV.  A Toyota Avalon made it to the top!  I got there at about 12 am and there were 3 parking spots open.
Snow:  Some at the top.  I did not put on Yak-tracks, but I used poles to help me.
Trail & trail conditions:  Great.  A little muddy & snowy at the top.  Watch for loose rocks.
Bugs:  None.
Time:  4.5 hours for a 67-year-old, which included a 30-minute rest at the top.  I took lots and lots of photos of and panoramic views of many mountains.
Views:  Incredible mountain views!  Beautiful river and valley views from the trail. 
Flowers:  Lilies, Small white flowers, and lots of lavender Flock.
Misc:  Although the shortcuts are very tempting, please do not use them.  If you use the short-cuts, you increase the chances for erosion. 

Arrived at the trailhead at 9:30am - we were the 6th car in the little lot.  We were back at the car at 1pm.  

No water on the trail so we packed plenty for the dog (soon to be 10 year old that weighs 95lb, his max hiking temp is 72 degrees).  The pinpoint weather was a high of 64 degrees with some high cloud covers. So I carried 1 liter of chicken broth and 1/2 liter of regular water for him.  He went through it all.  We left his wet hiking shirt at home on accident, so he was a dry dog today.  

snow starts as you turn onto the NE side of the mountain. Couple patches then turns solid on the last stretch to the summit.  We were fine in trailrunners, hiking poles, and microspikes.  There is a big slide down if u lose ur footing, and it would suck.  So just be sure of ur footing and comfort level. 

My dog and I stopped 6 feet from the summit - The snow is melting fast where it meets the rocky summit.  My hiking partner postholed to his thigh.  My dog is apprehensive when he nears snow bridges / hollowed snow.  So, we tried a couple different spots so to get off the snow in a safer spot.  But tbh, it all looked mush and melting.  My hiking partner made it to the summit - but I held onto my dog and we stayed back.  No regrets.  

the views were still awesome.  The wildflowers were out. Marmots were out (saw and heard at least 3).  Saw maybe 15 humans total today.  Weekday hiking for the win.  

Definitely a little early in the season for the summit. Road is snow free, but has some absolute craters in it to navigate. Hike is snow-free throughout the switchbacks and up to the south summit, with beautiful with flowers all the way up. The North summit was an "experience" to say the least. Trekking poles and/or microspikes are definitely reccomended, but we did manage to get it done with neither. The snow crossings were very steep, and a fall would likely result in a "fun" 1,000+ foot slide down into Sauk Lake. The way out at 12:00ish was fine, nothing too unstable, but once 2:00 rolled around the snow quickly melted resulting in a slushy ice-fest that was in parts "very sketchy" to say the least. We spent about an hour crossing the snow field on the way back, having to cut and pack a stable trail the entire way. There is some exposed scrambling up to the main peak which might make an inexperienced climber second guess their life decisions, but otherwise nothing that bad. We also saw some Wolverine tracks in the snowfield which was really cool. Safe to say we got everything we bargained for and a whole lot more. 

Road open until last switchback, where final crossing to parking lot is still half covered in snow drifts and impassible to cars (maybe next week). Parking at switchback may be a circus on a weekend. The road itself is in good condition, with the exception of a few potholes at the bottom, and some washboard on a few switchbacks. The low slung Prius-class sedans will have to navigate these with care, other sedans seemed to do fine.

The classy trailhead A-frame outhouse hasn't been maintained this year, and is the domain of the desperate.

Southern exposed trail is clear of snow to the ridgetop, with the exception of the topmost switchback in the trees, and the final easterly crossing to the ridge top. These winter remnants near the ridge top require navigating around with an incline that many would find uncomfortable.

Beyond the ridge top, it is pretty much all snow (as expected).

I stopped at the ridge top and enjoyed the view, the Glacier lilys, and communed with the marmots.

Trilliums were out in force in the forest edges, and crowds of Glacier lilys were chasing the snow drifts back.

Be on the lookout for falling rocks, which (apparently) is a thing in spring when snow is melting out. I saw a gallon-sized one careening down the switchbacks. Also, one person parked their truck on the final switchback traverse near the snow drifts, where I witnessed a basketball+ sized boulder bashing down the hillside 50' in front of it.

Snow on the road half mile from trailhead. No snow on the trail up to the last few switchbacks below the crest. It hurt to call it off that close to the top, but it'd hurt a lot more to slip, fall, and not stop til the very bottom. Wildflowers beginning to bloom but not out in full force yet.