Heavy (turf)Wettest possible condition of a turf course; not usually found in North America.
HelmetA lightweight fiberglass cap worn by riders to prevent head injuries. It is required equipment that is not considered part of a jockey's riding weight.
High WeightHighest weight assigned or carried in a race.
HomebredA horse bred by its owner.
HorseWhen reference is made to sex, a "horse" is an ungelded male five-years-old or older.
Hot WalkerPerson who walks horses to cool them out after workout or races.
HungA horse that does not advance its position in a race when called upon by its jockey is said to have hung.