Hi Chris,

Why do you want live feeds?
This would only be usefull for racing against the head of the race, which is not related to a particular athlete. Without pejudicing your skills but I would believe that pace would be a little high.

What you in fact need is a full set of waypoints covering the racetrack as accurate as possible.

Go into the Google Earth placemark for the Tour de France.
( A placemark is anything put into a KML/KMZ file to be viewed in GE. Or any single point within such a file.)

Open the Folder for a stage

--Étape 2, Lundi 3 juillet
|
---Route Étape 2

Here you find a placemark (One of the Items in the Folder) named "Route étape 2"
Right Klick on this Item and choose "save as..."
Save the file as "*.KML" with the name you want.

in this file you have a section like this

<LineString id="khLineString1012">
<coordinates>
7.43994,48.46145000000001,0
7.43928,48.4613,0
7.43887,48.46122,0
7.438690000000001,48.46119,0
7.43815,48.46111,0
7.43805,48.46109000000001,0
7.43757,48.46104,0
7.436950000000001,48.46099,0
.
.
.
</coordinates>
</LineString>
but much much longer
(in fact with 6634 points for Stage 2 ! that is an average of 35m between 2 points!)

Each line is a point of the trackline in the format "longitude,latitude,altitude"

Basically you do not have to understand this file format! Just go to
http://gpsvisualizer.com/convert
choose the file you just saved in GE and convert it to GPX format.
Download the attached GPX File of stage 2 as example for testing


Normally you should be able to import the GPX file into your trainer Software.
However, remember we do not have altitude information and can not get it.

regarding the altitude problem look here:
http://bbs.keyhole.com/ubb/showflat.php/Cat/0/Number/311913/an/page/page//vc/1


Live position is only published in the internet as progress in the race as a distance from start, therefore no coordinates!

I hope this clarifies a little your view of the situation.