A Tauranga woman is in Waikato Hospital after crashing her motorbike while racing at Hampton Downs yesterday.

The 47-year-old rider is believed to be travelling at 180km/h when she was involved in a motorbike crash with another rider and was thrown from the bike and landed on the track.

It is understood she sustained multiple bruises, abrasions and a possible fractured hand.

The rider was stabilised and flown to Waikato Hospital.