If you are considering a XC trip to Europe:

"Olympiaregion Seefeld is justifiably considered Europe's mecca of
cross country skiing. We are proud to be able to tell you that the
unbeaten quality of this destination has been confirmed through the
award of First Prize by the ADAC German Automobile Club in a comparison
of holiday destinations in Europe, Canada and the U.S. Besides that, it
was voted "Ski Area of the Year 2005" by the readers of the DSV
German Ski Association for its Atlas Ski Winter in the category of
"Outstanding Cross Country Trails" and awarded First Prize in a
comparison of 232 nominated areas worldwide."

http://www.seefeld.at/langlauf.html?&L=1