the last 20 miles are the hardest. Make sure you eat and drink right from the get go. You need to keep your body fueled and hydrated. I just finished the MS ride breakway to the beach 91 miles Saturday (just around 5 hours) 76 miles Sunday (3.5 hours). Longest traing rides I have done this year were 50-55 miles. Although, I trained for and completed a 1/2 ironman on 9/12/04 so I was used to training for 5-6 hours consecutivly. I would recommend you get a few training rides in at around the 75 mile range. A century is a great milestone. Good luck with it.

dug