Dedicated to all things PCT (and AT and CDT), they've got all sorts of articles and information, including interviews, blogs from the trail, and gear reviews.
Halfmile Maps & Trail Notes
Halfmile sells great maps of the PCT, but also has a massive amount of information available on their website, including maps, elevations, trail notes, GPS data, and an interactive Google Earth map.
As the Crow Flies
A great town guide to all resupply points as well as a list of a bunch of other resources.
Elina Osborne
Her youtube channel and short films are rife with tons of great advice and beautiful imagery - I've watched almost every video.
Trail and Errors
A podcast/blog about a couple's PCT hike. They record as they hike, with an episode per day, giving a really immersive summary of their hike.
Halfway Anywhere
A fantastic blog run by Mac, a thru-hiker who shares all his gear opinions and various hikes. He also compiles the famous PCT Reports every year with great stats about the trail.
Craig's PCT Planner
A great online PCT planner with mileage, dates, and elevations. He also lists lots of tips and advice, plus live data from various hikers. Simple but very effective!
Homemade Wanderlust
A great blogger and youtuber with a ton of information about her Triple Crown hikes, gear reviews, and lots of Q&As about hiking.
Hiking Thru Podcast
An awesome podcast where thru-hikers are interviewed by Erin, who's planning her own PCT hike. Tons of useful info and great stories from the trail.
The PCTA
For all official things about the PCT - permits, national park regulations, getting on and off trail, and some good tips as well!