We are expecting more of the dreaded "wintry mix" for tonight/tomorrow, so I'm going to see if I can complete the Hardcore 100 (the new Spinerval that runs 5.5 hours and simulates a Century) tomorrow morning. I've tried all three disks of this workout--not at once--but managed to do the first two in one session (3 hours, 35 minutes). I'm going to go as long as I can tomorrow and hope to do at least 4 hours. The workout gets more difficult as it progresses, and disk three has a good bit of big gear work. I've really enjoyed doing this one in segments, so the dread factor isn't that high. Unfortunately, I'm not fast enough to log an entire Century--Troy expects you to keep an 18mph pace--but I'll be more than satisfied if I can complete a metric century. Wish me luck!