ddalzell wrote:
There is the Deer Creek Century route that is 100 miles with 10,000 ft of elevation grade and some steep sections at that. I can't remember the exact route, but if you ride from Denver down to Deer Creek Canyon.. then turn left onto high grade, at the top there should be a little cycling rest area (if its still there... I hope it is because its awesome). There you can grab a cookie, gatorade.. and make a donation if you have a couple bucks on you. There is a map there I believe of the route. You will have done part of it already so just continue on.
The rest stop is still there and almost always has water, but it's hit or miss on the cookies.
Edit: Here's a link to the Deer Creek Challenge century route map.
https://coloradobikemaps.files.wordpress.com/.../deer-creek-2012.jpg Another possible option, if you don't mind crowds, and if you'll be there the weekend after Independence Day is the
Triple Bypass ride. It's a great route from Bergen Park in Evergreen all the way to Avon, CO, which is out past Vail. I believe it's around 120 miles. If you can do the supported ride, and if it isn't sold out, you can even do both days - Day One from Evergreen to Avon, and Day Two back the same way for a total of 240ish miles. Although it's the same route, the rides are very different depending on which direction you go. Even if you don't do the supported ride, you can ride the route, as it is pretty easy to follow the map that is provided online. You get to go over Squaw Pass, Loveland Pass, and Vail Pass, all great fun.
Here's the route from Day 2 perspective.
https://www.strava.com/activities/636972397
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