Although National Hunt events run all year round, the official season starts in October and finishes in April. It's worth to note that not all National Hunt races feature jumps. National Hunt flat races (bumpers) are used as a test for upcoming horses.
The biggest National Hunt race is the Grand National. However, events such as Cheltenham feature a host of major races, including the Cheltenham Gold Cup. Beyond that races such as the King George VI Chase and the Supreme Novice Hurdle all rank highly on the annual calendar.
If the race has been declared and your pick is a non-runner, you’ll receive your stake back. If your horse is part of an accumulator, this line is removed from the bet. If the race hasn’t been declared (an ante post bet), you lose your stake on non-runners.
National Hunt maiden races are for horses that have never won at the top level. In simple terms, these are events for horses that are just breaking into the competitive scene.