According to Wikipedia:
Telemark skiing (also known as "free heel skiing") is a form of downhill skiing using bindings where the boot is attached only at the toe (similar to those of Cross-country skiing), allowing the heel to come up from the ski. Because the heel is free, it allows the skier to go into a lunge position in order to turn. The act of lunging while turning is a technique called the telemark turn.
Read the rest of the description here: Wikipedia - Telemark.
The telemark turn is a beautiful thing to watch when done correctly, but doing it correctly may be a bit more difficult than it appears. The good news is that you can try it for free at the Telemark Festival on Saturday, January 18th at the Sipapu Ski and Summer Resort from 9 am to 4 pm.
Free telemark clinics and personal instruction will be available all day during Sipapu's annual festival. A special treat will be the presence of Santa Fe Brewery offering on site specials and a scavenger hunt.
At the end of the day will be even more fun at the Freeheel Fray at Sipapu following the free clincs. Beginning at 4:30 pm there wil be races with lots of prizes with the Santa Fe Brewery once again participating with beer specials and prizes for everyone. Telemarker or not, the event is free and open to everyone so come join the fun, do some skiing or just learn a bit more about this graceful event.
Keep on Traveling!