Wizards of the Coast has published Dungeons & Dragons stats for the Colossal Red Dragon from the D&D Miniatures game.
...This creature shows just how powerful things get at really high levels, as he goes to CR 36. Liberal use of the Draconomicon and Spell Compendium make him even nastier than you might expect. His hoard is listed in terms of items and value, and is left to you to populate. If you want to give him useful things, I suggest among other things that you give him metamagic feat rods. He can use those, and he has some killer spells that can be extended or empowered for good effect....