Sorry to hear of your struggles. To bad you didn't get in touch with me because I rode from Frisco to Keystone on the day of the TBP. We climbed up to Montezuma outside of Keystone. You could have ridden with us and skipped the Montezuma climb if you didn't feel like it.

Sounds like you might have pushed yourself to hard. I don't think staying in Denver hurt you because skiers are told to spend the first night in Denver before they hit the mtns. Our skier friends complain about tiredness the first couple of days, some, depending on fitness level and length of time they stay are worn out the entire time. Bicycling is much harder than skiing.

I assume you were well hydrated. The hotter it is here the lower the humidity. Even though I was drinking while riding, on the hot days, on Ride the Rockies I drank 1 or 2 water bottles of water at each sag stop, approximately 20 miles apart. I was really surprised because Accelerade usually keeps me going but I wanted water more. When we're in Summit County I start hydrating right away as I'm much more dehydrated than I am in Denver. I have to watch my old cat very carefully up there because she tends to get dehydrated much more easily and I have to keep her fluid level up. Even in the winter its easy to get dehydrated so I drink 12-24 oz of water when I get up in the morning.

This post from the Serotta forum explains what might have happened.

http://www.serotta.com/forum/showthr...&highlight=btc

This is from GPDavis2's post.

"Could be a big mistake for a couple of reasons. First, the most recent info is that one starts a gradual decline in altitudes that reaches its lowest point about 5-10 days after arrival. That would put her at the bottom of her altitude acclimation at the start of the ride. Second, she will be tired from riding in prep for those days, which will also help put her at the lowest point for the 6-7 days of the BTC. I did exactly what she is planning the first two times I rode the BTC. Then I learned (read more). Last time I rode I arrived the day before and was in much better shape until the end of the ride. No reason to get fatigued before the ride by doing the unfamiliar (riding at altitude). Either don't go out early or do so at least two weeks early so you start the ride after you on your way back up the acclimation curve."

It sounds like you were here 2 weeks early but pushing yourself very hard.

When you do a ride like the BTC or RTR most of the time you are between 6-8,000 ft with the occasional mtn pass climb so it is easier to acclimate than something like the TBP.

BTW, on Sunday I tried Vail pass from the Vail side and only made it 2 miles from the camp ground. It's a pretty tough climb and I was feeling my legs from Sat. I have yet to try Lookout Mtn.

I too feel a period of acclimatization when I come back to Denver after being at sea level.

Don't feel bad about yourself, I've spent years skiing here before I moved from Ohio and I know what it's like to suddenly try to exert energy when you're not used to the altitude.