I spent six solo days out on the PCT, from Forest Road 5603 to Sheep Lake, just past Chinook Pass.
I could go on for days about the trip, but I'll stick to the details I hope will be useful for others.
I chose Forest Road 5603 because it was 72 miles (ish) south of Chinook Pass, which was my ending point. That gave me about 12 miles a day to complete, a comfortable pace for me.
I used the directions for Potato Hill on WTA to get to the trailhead. Note: I found that the mileages for each turn off were a smidge too long. We reached each before we'd actually hit the mileage noted. Still, directions are fine. Leave yourself some time for this drive. The last section of road is rough, but passable in a passenger car.
I started a bit before noon and still was easily able to get in 13 miles well before dark. This first section of trail is mostly in wood and is extremely easy hiking.
The bugs were bad here in any of the forested areas that were damp, especially in the evening.
The next day I climbed up and over Cispus Pass. There was a small bit of snow here. It was all easy to cross, except for the last 12 feet or so, when the boot path goes up a very steep pass. I have short legs and the steps were too big for me, but I made it fine. Given how fast everything is melting out, this could even be gone by now.
The basins on both side of the pass were gorgeous. Cispus Basin was particularly lovely. It had tons of waterfalls and streams crossed the trail many times. There are a number of good camps on the far side (if you're traveling north) with truly excellent views. I really wished I'd been able to stay the night there.
That night, I camped below the climb up to Old Snowy. There's a nice camp back off the trail to the west. Look for an obvious foot path. I experienced something fascinating while staying at this spot. When I arrived, I went to find water. There was a small stream, which was only running at a trickle, although it had lovely deep pools. While I was making camp, suddenly I realized I could hear water gushing. I went back down and the stream and turned into a rush. Clearly the sun must have hit a patch of snow and dramatically sped up the melting. I was entranced. The next morning, the stream was back to a gentle trickle.
There are also some more exposed camps up closer to the Old Snowy Pass and the Goat Rocks. The view from them is amazing.
The climb up to Old Snowy felt long for some reason, but it's really not too bad. There are a few lingering snow patches and I was grateful for my trekking poles. (I'm a pretty big wimp about snow if I don't have an ice ax.)
At the top, the trail splits giving two options. Right takes you up toward Old Snowy. Left takes you along the PCT. Left is shorter and has no gain. I chose right for two reason. One: Did I mention I'm a wimp about snow? There was a long section of snow with exposure that made me nervous. It ended with a steep downhill that also had exposure on one side. Most people were going that way, I think but I suspected going to the right would mean less snow. And reason two: I wanted to get up higher and have a good look at Old Snowy, even if I didn't have time to scramble up to the true summit.
I'm glad I went to the right. There was only a little snow, not at all scary. The view from the top was lovely, including a really cool walk through some tall rocks that rise up impressively on each side. The trail was pretty rough. Some was scree and some was rough slabs, but it wasn't hard to follow and I'll take sketchy rock over sketchy snow any day. Your mileage may vary.
I do recommend taking the short Old Snowy detour. It only adds a few tenths of a mile and a couple hundred feet of gain. The views from up there are awesome and you get a really good view of The Knife, the next section of trail.
The Knife was gorgeous, huge views all around. A few areas had tiny patches of snow and lots of areas had loose scree. In a couple short sections, the trail has sloughed away to almost nothing. Again, I was grateful for my poles. The trail here rolls up and down a lot. Note: There is, as you'd expect, no water up on the ridge for a long ways. This was the only section where I ran out of water for long enough to wish I had it. (If, however, you're not like me and don't knock over your nearly full water bottle, you'll be fine.)
The valley below The Knife was lovely. I wished I could have stayed there, but I needed to make more miles.
The last snow crossing on the way out scared me -- that snow bridge is going to collapse at any moment. It may have already. I was very careful crossing. There were a number of downed trees on the trail on my way to Hidden Springs, where I camped. None of the trees were hard to navigate around, however.
Hidden Springs is a bit back off the trail. There are many camps here. To find the springs, take the first obvious left on the side trail. (The turn to the springs is across from an obvious campsite.) If you follow the main trail all the way to the end, across a small meadow, there's a lovely, big, private site with an excellent view of a valley below.
The next day I hiked as far as Dumbbell Lake. The bugs were bad on this section of trail. Dumbbell Lake is also a ways off of the trail, perhaps a little over half a mile. It was definitely worth the side trip. I had the entire place to myself, except for a doe and her two fawns, a sandpiper and her baby and 8 million mosquitoes. Seriously, the mosquitoes were terrible and I think I have a high tolerance. I was thrilled when the wind picked up. I ate my dinner on a chunk of rock sticking out into the lake. The wind kept the bugs away. When I went back to camp, more protected in the woods, the swarm followed me. I got into my tent as quickly as possible but I had to smash 24 (24!) mosquitoes that came in with me.
Anyways, Dumbbell Lake: Highly recommended unless you really, really can't stand bugs. Near the lake there's a section of forest that must have burned some years ago. The white snags looked really pretty in the evening light.
The bugs are bad on each side of White Pass once you get a mile or two from the road. I suspect the knowledge about this has gotten around since I saw about two dozen hikers while descending to White Pass and all but one had bug nets over their heads.
From north of White Pass, it looks like some trail work has been done recently to clear logs. Thanks! It's a very nice section of trail. Smooth and easy. I spent the night at Two Lakes. My map showed a loop trail off of the PCT that ran by Two Lakes, but I think that trail may be overgrown. Or I missed it. Anyways, I just took the side trail down to the lake. Again, I had it to myself.
For my final day, I decided to push on to Sheep Lake. My ride was picking me up early the next morning, and I knew it would be easy to make it down to Chinook Pass from Sheep Lake. I regretted that decision. It was a Friday and Sheep Lake was hugely crowded. I should have expected that and stayed before Chinook Pass rather than after it. Dewey Lake would have been a good choice.
This is a lovely section of trail. I highly recommend it. The Goat Rocks were the highlight of the whole trip, and I'm certainly going to go back to explore that area more.