Tracks on one map

Sorry, but there is no current way to do this... easily at least.

This might change with a fix here #306528: Views 2.x support for KML module

Until then, it is possible to create yourself a small module to emulate what views might do, I wrote about that here:

http://drupal.org/node/306528#comment-1776000

When you have a view or page that outputs the appropriate KML it is possible to have Google Maps load the output from that. An example of this how NoBMoB works. Eg, all the tracks (and pictures for that matter) form Manly Dam:

http://maps.google.com.au/?q=http://nobmob.com/node/12/kml

You can actually embed such a map into your by adding the output=embed variable and putting the contents in an iFrame:

http://maps.google.com.au/?q=http://nobmob.com/node/12/kml&output=embed

This is how the maps on this page are generated, even though they don't actually show tracks, just for clarity:

http://nobmob.com/rides

Here's another example of how this looks:

http://nobmob.com/node/10/map

I can assure you it isn't very hard at all, and it's certainly worth the effort.