I have never seen a track listed for damp location and I have looked. The problem is the track is open and exposed.
If you read article 410.151(C) of the NEC 2008 you will see this
(C) Locations Not Permitted. Lighting track shall not be installed in the following locations:
(1) Where likely to be subjected to physical damage
(2) In wet or damp locations
(3) ..... ec