The Sufferfest training plans in TrainingPeaks: The Sufferfest Training Plans | TrainingPeaks
(NB: they don’t seem to be updated)
The Sufferfest workout library in TrainingPeaks was announced on Twitter in 2019: https://twitter.com/TheSufferfest/status/1106324281040896000?s=20
(NB: the list of workouts is super-useful to plan ahead in TrainingPeaks but it’s also not updated regularly, and I can’t tell for sure, but it looks like the link in that tweet no longer works 🤦🏻)