A few corrections to the WTA entry:

1) The sign off I-90 IS exit 34, but is NOT signposted for Edgewick Road.
2) The trailhead is closer to 7 miles (vs. 7.4 miles) down the Middle Fork Snoqualmie Road.
3) Pass required is a Discover Pass, not the NW Forest Pass

We tried to turn left onto the CCC trail from the road, but were immediately faced with a rapidly running creek without any obvious rocks to use to cross it. Not wanting to take a swim in November, we continued up the road and then turned right onto the CCC trail.

That was a bit more successful, and we managed about 10 stream crossing before facing another one running rapidly and without a good way to cross without water over the tops of our boots.

We gave up on the CCC trail. Would probably be better when the water isn't so high and the streams more crossable.

TL;DR: if you want a closer hike that is secluded, full of green, and don't want a lot of elevation, this hike is awesome, tell no one.  Also Salmonberries.

I loved how close to the city yet secluded this hike was. On a Saturday we encountered one other group of people.  The trailhead had 3 cars on it, but there was still room to pull over (even though there is not a parking lot here). (Note the trail head stated Discovery Pass required, not NW Forest pass)

Was a little confused by the directions on this site, since it said to go west at the junction on a wide path, but what we found was an immediate stream crossing and a narrow path.  Regardless we took this path (at 1 mile from the trail head).  The first stream crossing was a little tricky, but the logs laid across it were stable and solid (definitely crawl if you are not too stable like me). The stream was shallow and slow enough that our dogs were able to wade across safely.  There were a lot of mosquitos but they didn't bit me, they did bite the person I was with a lot.

Throughout the trail there were a lot of minor stream crossings, but all fairly shallow if you are willing to submerge your feet.  We were able to cross by walking across the rocks, but some are super slippery.  We got to a faster larger/wider crossing about 1.2 miles in from the turn out and decided to turn around, we probably could have made it across, but the trail was secluded enough and we were far enough in, that it would have been bad if we got hurt.  

After turning around, we decided to go farther up the road to see if maybe there was another turn off we missed.  We didn't find any but it was still enjoyable.

My favorite part of this hike was that the salmonberries were perfectly ripe and abundant throughout most of the trail.  I saw lots of flowering blackberries, to visit in august when they should be ripe.

Did a little recon trip for Section B of the Issy Alps 100 course connecting Mailbox Peak trail head to Teneriffe trail head via: Granite Creek Trail (aka Granite Lakes Trail), Granite Creek Connector Trail (aka Granite Creek short cut), NFDR 5600 across the bridge over the Middle Fork Snoqualmie River, Sitka Spruce Trail, to CCC Road.

The Granite Creek Trail and Granite Creek Connector Trail are in really great shape, there are no blowdowns, the trail has clearly recently been maintained, with several log benches along the route. The wooden bridge is in great shape, there are several small stream crossings, but most have stepping stones and the water is only puddle deep, so you can easily manage without getting your feet wet.

The new parking lot at the start of the Granite Creek Connector Trail head is coming along nicely, but it in full construction mode. If you come through during the work week, you will surely have to deal with construction and may get sent away.

The entrance to Sitka Spruce Trail from NFDR 5600 is immediately on the North/East side of the bridge, next to the road sign. The trail down from the road to the trail proper is steep and unstable, but it's short (only a couple feet).

Sitka Spruce Trail is currently in it's spring/summer overgrown state. The trail is easy enough to follow, but the foliage is crowding the trail. You will get scrapes on your legs and arms from the nettles, blackberries, and other trees and bushes. There are couple of stream/creek crossings that will likely require some wet feet to cross, but the water is no more than ankle deep at most, and there are rocks and/or logs to hop on if that's your preference. The upper section of Sitka Spruce closer to the CCC Road does have a few patches of slippery, shoe deep mud, that would be difficult to avoid.

CCC Road is in great shape. I ran into a couple of different groups on the CCC who were looking for the trail to Green Mountain. None of them had paper maps or GPSs... tisk tisk... Always bring a map people! I did my best to point them in the right direction, but I didn't actually travel to the official trail head, so I don't know if their problems finding it were user error or an actual problem with the trail. Two hikers told me they saw the trail head but it seemed "extremely overgrown".

Once you get off the CCC and onto SE Mt. Si Road, you'll pass the home and studio of "Ivan" the artist. He has an amazing giant "Big Foot" statue. He's quite proud of it, and he'd love for you to stop and chat with him about it. I learned it took him 5 years to complete.

Note: the trailhead is not marked, but directions on the WTA website are accurate. 7.4 miles is right on. You will pass a bunch of vehicles parked on the left for Mailbox Peak. Keep going, you're on the right path.

The hike itself is quite nice, easy enough but with some nice views of waterfalls, clearings, and foilage. It's very secluded so you'll get a nice sense of peace and quiet.

The hike starts off uphill on a gravel trail. This is the most elevation gain you'll have for the whole hike. At the top of the gravel trail, we turned left and crossed the stream but you can also take a right turn and go the opposite way. We kept walking and crossed the second big waterfall. We kept going and got to a fork in the road. We weren't sure if it was a loop or not so we decided to do the out and back route. It ended up being just over 8 miles. 

This trail is an easy, wide, secluded trail. We went on a beautiful, sunny, Saturday and only came across 3 other parties! Only obstacles on the path were several creek beds with lots of water! These may be difficult to cross from some. Saw some unripe berries, frogs, toads, and lots of spider webs across narrower parts of the trail.