Currently there are 9 different prize tiers when doing the timed challenges each week.
However you can only see from the rankings screen on the left how much gold, runes, food, breeding points you need to be in either 1st, 2nd, 3rd or 50th place, for each of the other prize tiers you have no way of knowing how far away you are from making it into the next one.
It would be good to know how much you need to get to 500th position, 5000th etc, to have a target to aim for.
Even it it just showed you how much you need for the next prize tier above the one you are in now that would be good. It could be shown just up above where it shows your current ranking on the left.