Race Ideas
Entry fees of 100,000 dappers per team/player.
Idea one
Relay Team Race.
3 Teams. 1 Team in each town. (unless you got more then 3 towns..

)
Team 1 runs to team 2, 2 to 3 3 to 1... the entire team has to arrive in the town before the next team sets out.
Winning team gets the total of the entry fees.
Idea two
Cross country race.
Race for Karavan teleports. First player to arrive at finish with X number of karavan tickets wins. Players might need to be checked by GMs prior to race start and at finish for tickets (if possible) or players would be placed with specific items to give to racers for them to hold, to prove they had been to the locations required. 2nd option probably easier to work then first, as it would not require the large amounts of caffine, thats usually required to keep GMs alert.
Idea three
Canyon Mektoub racing. Get you and your mektoub racer from start to finish alive. (will require patch XXXXXXXX to allow mektoubs to carry the riders)
A slight alternate to this would be to do the race with people leading thier mektoub packers, these people would naturally carry the cost if the beasts were lost. As well as the purchase costs of getting one to race with.
Idea four
I'm sure i could think of others or dredge up something done somewhere else..