[NormsRevenge]

LOL

http://www.merriam-webster.com/dictionary/piste

Main Entry: piste
..
Etymology: French, from Middle French, from Old Italian pista, from pistare to trample down, pound — more at piston
Date: circa 1741

: trail; especially : a downhill ski trail

[NoControllingLegalAuthority]

So, the writer could not say “downhill ski trail” so people might understand?