For people like me, that wonder what it would be like to ride a 100 mi mtn bike event, here's my test experience. My only personal expectations were to ride at least 10 mi per hour average speed so I would finish within 10 hrs: I rode my first 100 mi mtn bike ride Saturday. Started out as a perfect day to be on the bike all day. By the time I dismounted, I was beyond expired, would not of wanted to pedal another mile. Actually, by the time I got home, I had 101.7 miles. I thought I'd do a simple mtn centry & just ride out my back door to the Poto, then over to Brighton trails. I rode the Poto 18mi double, 5 mi Crooked Lk & 2.5mi Silver Lk. Then I rode back to my house for a pit stop, then out the back door to the Brighton trails. Rode Torn Shirt (had about 70mi on legs when I started torn), rode all Murray (including lost & found loops), then had to ride the 7mi Murray again to reach 100 by the time I rode 4 miles back to my house. Going back out on the Murray again was the toughest part, I was feeling ill (too much Gatoraide I think), my a$$, arms & feet were toast. The thing that was a pleasant surprise, was that my hamstrings started to spasm at the Poto, but the pit stop for real food & some brewers yeast, mixed in tomato juice, worked wonders because I didn't cramp up again. The ill feeling was my main limiting factor for the remaining 30mi after my home pit stop. When I got home at dark, it took all my effort to just get into the shower, so I could lay down. I got up at 12:30am to have some food & drink. That was a great thing to do, this morning I almost feel normal & I slept like a rock. So much for a "simple mtn century", turns out there's no such thing in my vocabulary. Now I have a deeper personal respect for the 100 mi ultra endurance competitors. It's quite an accomplishment to push it, after your body is pretty much empty.
Almost forgot to say: ride time, 9hr 13min> ave speed 10.8mi/hr> pit stop under 45min total off bike time> Just squeaked in under 10hrs total, oh ya that was simple.