The events most often included in international competitions for Senior Athletes are the 20km and 50km road walks for men, and the 20km road for women.
International track events are mainly 5,000m. Within New Zealand there is a National Track Title event for 3,000m only.

Amongst Juniors (i.e. 19 years and under) the recognised events are 10,000m (road) for both male and female (M19 & W19) and 3,000m (track) for both M19, W19 & M16, W16.

Amongst Secondary Schools the distances vary between 2,000m and 3,000m.

For M14 & W14 Athletes and under the distances are normally 1,000m - 2,000m.

Action
"Paragraph: 1

Race walking is a progression of steps so taken that the walker makes contact with the ground, so that no visible (to the human eye) loss of contact occurs. The advancing leg shall be straightened (i.e. not bent at the knee) from the moment of first contact with the ground until the vertical upright position."

Refreshments
Approved refreshments may be taken at official refreshment stations in walking races exceeding 20km. Domestically, Drink Stations are provided in events from 10k (10,000m) up. 
Stations are sited at 10km and then every 5km.
No other refreshments are allowed.
Additional sponging points, supplying water only, may be provided at points after 20km.

Disqualification
"Athletes shall be cautioned when, by their mode of progression, they are in danger of failing to comply with paragraph 1 above by showing the athletes a yellow paddle/card with the symbol of the offence on each side. They cannot be given a second caution by one and the same Judge for the same offence.

When a Judge observes an athlete failing to comply with paragraph 1 above by exhibiting visible loss of contact or a bent knee during any part of the competition, the Judge shall send a Red Card to the Chief Judge."

In track races a disqualified competitor must immediately leave the track. In road races he must immediately remove his number.
If immediate notification impracticable, competitors may be disqualified immediately after a race ends.

The Olympic steeplechase is a men’s event run over 3000m. It comprises 28 hurdle jumps and seven water jumps.
Competitors may jump, vault, or stand on the hurdles.
Competitors run outside the water jump on the first lap.

Steeplechase hurdles have a base on either side and must weigh 80-100kg (176 1/2-220 1/2lb). They are positioned across the three inside lanes.

The water jump is the fourth jump in each lap. The water jump hurdle stands the same height as the other hurdles, but is sunk into the ground.

                                     http://www.athletics.org.nz

Competitors leap from a take-off board into a sand landing area. If there are fewer than eight competitors, each one generally has six trials; otherwise competitors generally have three trials, and then the best eight competitors have a further three. The competitor with the longest jump in his six trials is the winner. A tie for first place is decided by the competitors’ second-best jumps.Landing areaThe sand in the landing area should be moistened before the competition begins. It must be raked level with the take-off board before every jump.Take-off Board and Plasticine Indicator BoardThe surface of the board beneath the plasticine shall be of a material in which the spikes of an athlete's shoe will grip and not skid. The layer of plasticine can be smoothed off by means of a roller or suitably shaped scraper for the purposes of removing the footprints of the competitors.