Slalom gates are flexible poles set in pairs that create a zigzag path down the hill; racers must pass between each pair in the correct order, or they’re disqualified.

What a slalom gate actually is

  • Each gate is made of two vertical poles (now usually hard plastic, hinged at the base) instead of the old rigid bamboo ones.
  • In classic alpine slalom, the poles are usually red and blue, alternating down the course so racers can visually track the rhythm.
  • In some explanations and lower‑level setups, you’ll see a small flag or panel between the poles, but at World Cup level it’s often just the poles themselves.

These poles are designed to bend and spring back when a skier hits them, reducing the risk of injury while still clearly marking the racing line.

How they tell racers where to go

  • The course is built as a sequence of alternating gates : red, blue, red, blue, and so on, forming a zigzag down the slope.
  • A racer must pass between the two poles of each gate so that both ski tips and both boots go through that “doorway.”
  • If the skier goes around the wrong side or misses a gate entirely, it’s a disqualification in typical modern rules.

For elite men, a slalom course often has roughly 55–75 gates; for elite women, around 40–60, all set to create constant, sharp direction changes.

Why gates are hinged and “hit” on purpose

  • Modern gates are hinged at the bottom, so when a racer’s shins, hands, or poles hit them, they snap down and pop back up instead of requiring the skier’s whole body to go around.
  • This allows a technique called cross‑blocking or “clearing” the gate: the skis go just outside the pole while the upper body cuts closer, physically knocking the gate out of the way.
  • Shinguards, pole guards, and sometimes forearm guards are worn because high‑level racers hit a lot of gates each run.

The hinged design is a big part of why modern slalom looks so direct and aggressive compared with older footage where racers had to steer fully around rigid poles.

How gates are arranged to shape the run

Course setters use different gate patterns to change the rhythm, difficulty, and tactics of a run.

Common ideas:

  • Open gates : “normal” offsets left–right with comfortable distance, letting racers build speed.
  • Verticals/flushes : several gates in a nearly straight fall‑line that force a rapid series of short, quick turns.
  • Delays : a gate set farther down or across the hill that “opens up” the line, forcing a longer turn and re‑timing the rhythm.

Even though you sometimes only notice one pole on TV, that’s often the inside pole of a pair; the “outside” companion pole can be off camera or ignored visually by the racer once they know the line.

Safety and rules side

  • Spacing between gates depends on level and rules; for high‑level slalom, distances on the order of about 6–13 meters between turning poles are typical, with shorter spacing making it more technical.
  • Gates are set with terrain, snow conditions, and expected speed in mind so that crashes stay within acceptable risk and the course is fair for all racers.
  • The flexible bases and detachable flags/panels are there so impacts are absorbed by the equipment rather than the skier’s joints.

A useful way to picture it: the gates are like a moving puzzle you solve at high speed—each pair tells you where your skis must go, and the whole pattern together decides how fast and how rhythmically you can get to the bottom.

TL;DR: Slalom gates are flexible paired poles (red and blue) that racers must pass between in sequence; their spacing, angle, and special combinations (flushes, delays) control the rhythm, difficulty, and speed of the run, while the hinged design lets racers hit and clear them safely at high speed.

Information gathered from public forums or data available on the internet and portrayed here.