Oooh, I walked the whole track once. Gives you real perspective as to just how long those straights really are!

Sebring's actually pretty simple for 3.7 miles. 17 turns... and as hinted at above, you can really break it down into fewer chunks than that because some turns are non-events, and some turns (like the carousel 8-9 and 11-12, and 14-15-16 to some extent) chain together into one element.