When I'm in a classical mood, these get me fired up for climbing:
Fanfare to the Common Man - Copland
Alpine Symphony (The Summit) - Strauss
White Tree (Lord of the Rings soundtrack) - Howard Shore
Duel of the Fates (Phantom Menace soundtrack) - John Williams
Resurection (2nd) Symphony - 5th Movement - Mahler
Festive Overture - Shostakovich
Call of the Champions & Summon the Heroes (2002 Winter Olympics) - John Williams
When I'm not in a classical mood, I'll put on the Foo Fighters' "One by One" song.