A few of us are planning to ride Perm #4162 (Hyak-Stampede & Tacoma Passes-Lake Easton,
https://ridewithgps.com/routes/36793260) on Monday 09/22. We don't have a specific start time yet, but given that this route starts in Hyak it won't be super early.
This looks like a challenging route -- 103K, all gravel, two mountain passes (Stampede and Tacoma), zero services. All riders will need to bring extra water, food, and everything else they'll need.
Since this route is all gravel we get an extra 1:43 to complete it -- the time limit is 8 hours, 35 minutes. (Note: The time limit in the RWGPS cue sheet is wrong, it doesn't include the gravel time credit. I've let RUSA know; they'll update it soon.)
If you're interested in joining in the fun, please let me know and I'll keep you informed.