Kristin Armstrong, the road cycling Olympic Gold Medalist, borrowed a GPS from her "technology buff" husband and used it to record her trial run on China's unusual 15 miles road bike course.
She then downloaded the data and using Google Earth, was able to see the path of her ride and then find one near her hometown of Boise Idaho that matched it's elevation profile.
The road bike course in China had much more climbing than a normal course and so Kristin was able to train for that. So really it was training but she wouldn't have know how to train without the technology.
We think Google Earth is about the best thing since email and have used it to plan all kinds of trips, both off road and on. Have a look at our Google Earth waypoints for The John Muir Trail, going from Yosemite Valley to Mount Whitney.
Google Earth Blog has the Story