lang·lauf 
(länglouf′)
(länglouf′)n.
1. The sport of cross-country skiing.
2. A cross-country ski run or race.
[German : lang, long (from Middle High German, from Old High German; see del-1 in the Appendix of Indo-European roots) + Lauf, race (from Middle High German louf, from Old High German hlouf).]
langlauf′er n.