Hello fellow Ruy players - does anyone know of a particular Ruy Lopez variation where white castles kingside, and then at some point begins to move his own kingside pawns up the board? I have seen this done in master-level games, but when I look through my own books on the Ruy I can't find any good annotated games that explain why, when, and what makes this dynamic strategy possible. It's a slow strategical idea, but when done correctly it's almost like a reversed King's Indian Defense. Any books (particularly ones that explain the how and why of the position) or databases (or even an ECO #) you can refer me to would be great, thanks.

Far and away the best book I've ever read on the Ruy Lopez is Mastering the Spanish, by Danny King & Pietro Ponzetto.  Fantastic breakdown of the opening's strategic principles & tactical themes, categorized not by variation per se, but by central pawn structure.  (I wish I could find something like this book for the Sicilian!)

Anyway, if you can lay your hands on it, that would give you a great deal of insight into the answer to your question.  It's not really any particular variation; just a strategic plan that white can follow in the closed variations, especially when the center has been closed by white playing d5.

 possibly a closed ruy lopez with a closed center, e.g. C98.

Spiffe - thanks for the book reference. With such an enthusiastic endorsement, I will definitely look for it. 

josef5555 - much appreciated for the ECO#. I'll look it up for sure. Now I'm wondering if the Worall attack variation is connected with the kingside pawnstorm idea...

The 5.d3 variation sometimes leads to a K-side pawn storm for White. Also the 9. d3 variation. The pawn on d3 keeps the e4 pawn strong enough to keep the center stable enough that White can storm Black's K-side.