I'm Escaping from Alcatraz next June

I entered the random drawing for a race entry for next year's Escape from Alcatraz Triathlon on a whim, and to my surprise, got a slot in the first drawing. It's a bucket list race, which involves jumping from a ship near Alcatraz Island into the icy cold waters of San Francisco Bay for a 2.4 km swim, a 29 km bike ride through the Presidio of San Francisco, and ending with a 12.9 km run that includes climbing 400 steps up Baker Beach's infamous Sand Ladder. I'm not quite sure of what I have gotten myself into, but I'm equal parts excited and terrified.