If you use GSAK or another software tool that can import GPX files, all of the Adventure locations for the entire Washington Coastal Adventure Series are included in this file.
If you use the cachetur.no website to plan your geocaching trips, this file contains a complete list of all WCAS locations ready for bulk import into your trip plans.
Here are the routes, generated for each county on geocaching.com's route feature. The routes are public and, if you are a premium geocaching member, you can create pocket queries to generate caches along the route to add those to your trip as well.
Here are some interesting bookmark lists. The bookmark list for each of the counties contains the oldest active cache in that county (and all caches that were placed in 2000 or 2001) along with caches that have at least 50 favorite points (last updated 5/9/2022).
Washington's Oldest Caches (all caches from 2000 and 2001 in the entire state)
Washington's Most Favorited Caches (100+ favorite points)
Rare Caches in Washington (Webcams, Old Virtuals)