So the update has added in a race track where you can pay 50,000 (so far) to enter your dragon and then race it. Unlike most things in Dragonvale this is an interactive race and dragon selection has a large impact upon the outcome as the dragons naturally move faster in the environments they are attuned to and move slower in ones that are their opposites.
What I am after is a list of the race tracks and their elements. I can guess at some of them but some times I am very far off (I thought shimmering was ice, instead it was lightning for example).