Originally Posted by CrossChain
It's always easier with companions to share the ride with. Conversation, company, someone to slip in behind-- make those last miles easier and give you something to think about when you've run out of comfortable positions on the saddle and your body has begun to complain. People with equal motivation and riding style really help ease the miles, encourage, distract on any ride that pushes your limits.
+1
And, I find that hills are a lot easier if you have someone to chat with as you climb them. It really makes a difference.
If you can do 75, you will do 100 in an organized century. Set a gentle pace - this is not a contest, but an event. Enjoy. 40 miles at 18 mph average is not a gentle pace!