Congrats on the 100! That is quite an accomplishment especially given the elements of this year.
Mentally, I am in great shape. Candidly, an hour into leaving Jackson Park for the final time my GPS only read that I traveled a mile and that sucked the life out of me, thinking I had 14+ more miles to go and I had 10 hours on the trail at that point. Once I got home and trued-up my distance I realized i had gone farther than expected. Would that have kept my mind in it to keep going? Hard to say, but I was demoralized after only seeing 1 mile of progress. Mentally I am good and in a positive place. I did a quick ride this week (Torn Shirt at Brighton Rec for you downstate folks) and had a blast and was excited to get back into pushing it.
I appreciate the suggestions.