What is the exchange zone in a relay?

A 30-meter marked area where the baton must be passed. The baton, not the runners' feet, must change hands inside it.

What happens if you pass outside the exchange zone?

The team is disqualified. Completing the pass before the zone starts or after it ends is illegal, even by inches.

How long is the relay exchange zone?

It's 30 meters for the 4x100 under current World Athletics rules, and 20 meters for the 4x400 and other longer relays, which never had an acceleration zone.

Did the relay exchange zone used to be shorter?

Yes. Before November 2017 the 4x100 used a 20-meter pass zone plus a separate 10-meter acceleration zone where only the runner, not the baton, could be moving. World Athletics merged them into today's single 30-meter zone.

What Is the Exchange Zone in Relays?

What Is the Exchange Zone?

The exchange zone is the marked strip of track where a relay baton legally changes hands, and getting the timing wrong is the single most common way a fast relay team never makes the results sheet. For the 4x100, that zone has actually changed size in recent memory: it used to be a 20-meter pass zone with a separate 10-meter acceleration zone in front of it, and since November 2017, World Athletics merged the two into one 30-meter zone where the baton itself can legally change hands anywhere inside it. The 4x400 and other longer relays never had that extra zone, and still don't, since the speed differential between runners is much smaller. Here's what the zone is, how big it is by race, and what actually changed.

What the zone is

The exchange zone is the stretch of track, marked by lines and usually triangles or chevrons at each end, within which the baton must fully change hands from the incoming runner to the outgoing one. It's the baton's position that gets judged, not either runner's feet, which is why a legal pass can look messy as long as the handoff itself happens inside the lines. Officials watch the baton cross the boundary lines, and a pass completed a foot outside either end is a violation regardless of how clean it looked.

The rules, and what changed in 2017

Before November 2017, the 4x100 used a 20-meter zone where the baton had to change hands, plus a separate 10-meter acceleration zone in front of it where the outgoing runner could start moving but couldn't yet take the baton. World Athletics folded those into a single 30-meter zone, so today the pass itself can legally happen anywhere across the full 30 meters. Current NCAA rules match that 30-meter zone for the 4x100 and 4x200. NFHS has been revising its relay-zone rules in recent rulebook cycles, so check your state association's current book rather than assuming either number applies at the high school level.

Why the zone exists, and why longer relays don't get one

The zone gives the outgoing runner room to build speed before receiving the baton, so it never slows to a near-standstill during the pass. That matters far more in the 4x100, where the speed gap between a runner accelerating out of the zone and one arriving at top speed is huge. In the 4x400 and other longer relays, incoming runners are usually fatigued and moving closer to the outgoing runner's own speed, so those events use a flat 20-meter zone with no acceleration allowance at all.

See where your baton actually changes hands

A legal, fast pass is a matter of inches and timing. Film the exchange against the zone lines, the AI shows where the baton changed hands and whether the outgoing runner was at speed, so you can move the go-mark with confidence.

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Sources: World Athletics rule history on the 2017 exchange-zone change, confirmed against the current NCAA Track and Field Rules for the NCAA row. The NFHS 4x100 outdoor zone length is not confirmed here; NFHS has revised relay exchange-zone rules in recent rulebook cycles, so check your state association's current book.
Relay	Zone length	Acceleration zone	Rule body / era
4x100m (current)	30 m	Folded into the 30m zone; the pass can happen anywhere inside it	World Athletics, effective Nov 1, 2017
4x100m (before Nov 2017)	20 m pass zone	Separate 10m zone in front, runner-only, no baton pass allowed there	IAAF / World Athletics, pre-2017
4x100m, NCAA	30 m	Folded into the 30m zone, matching the current World Athletics rule	NCAA Track and Field Rules
4x100m, NFHS	Not confirmed here; check current state rulebook	NFHS has revised relay-zone rules in recent cycles	NFHS Track and Field Rules Book
4x400m, 4x200m, 4x800m	20 m	None; these relays never had one	World Athletics
Zone marking	Lines at both ends, often with triangles or chevrons	n/a	World Athletics recommends the style; exact marking isn't mandated
Pass completed outside the zone	n/a	n/a	Automatic disqualification of the team, any relay

Sources: World Athletics rule history on the 2017 exchange-zone change, confirmed against the current NCAA Track and Field Rules for the NCAA row. The NFHS 4x100 outdoor zone length is not confirmed here; NFHS has revised relay exchange-zone rules in recent rulebook cycles, so check your state association's current book.

Relay

Zone length

Acceleration zone

Rule body / era

4x100m (current)

30 m

Folded into the 30m zone; the pass can happen anywhere inside it

World Athletics, effective Nov 1, 2017

4x100m (before Nov 2017)

20 m pass zone

Separate 10m zone in front, runner-only, no baton pass allowed there

IAAF / World Athletics, pre-2017

4x100m, NCAA

30 m

Folded into the 30m zone, matching the current World Athletics rule

NCAA Track and Field Rules

4x100m, NFHS

Not confirmed here; check current state rulebook

NFHS has revised relay-zone rules in recent cycles

NFHS Track and Field Rules Book

4x400m, 4x200m, 4x800m

20 m

None; these relays never had one

World Athletics

Zone marking

Lines at both ends, often with triangles or chevrons

n/a

World Athletics recommends the style; exact marking isn't mandated

Pass completed outside the zone

n/a

Automatic disqualification of the team, any relay

What Is the Exchange Zone?

The exchange zone, explained

What the zone is

The rules, and what changed in 2017

Why the zone exists, and why longer relays don't get one

See where your baton actually changes hands

The baton must change hands inside it

Exchange zone length, by relay and era

What Is the Exchange Zone? FAQ

The full relays index

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What Is the Exchange Zone?

What the zone is

The rules, and what changed in 2017

Why the zone exists, and why longer relays don't get one

See where your baton actually changes hands

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