How to Run a Marathon Relay: The Complete Guide to the 4 × 10K

The marathon relay is the most underrated event in road running.

You get the full marathon experience — the closed roads, the crowds, the finish line, the medal — without the four-month training block or the mile-20 crisis. You get to race hard for 40 minutes rather than survive for four hours. And you get to do it with three other people, which changes the entire character of the day.

It’s the format that gets non-runners into their first big event, gives injured marathoners a way to still be part of race weekend, and turns a solo sport into something closer to a team one for a morning.

It’s also more complicated than it looks. Here’s how to do it properly.

What a Marathon Relay Actually Is

A team of runners covers the full 42.195km marathon course between them, running the same route as the solo marathoners, usually on the same closed roads and often starting at the same time.

The most common structure is four runners covering roughly 10km each, though the exact split varies considerably by race. Some events divide it evenly. Many don’t — the legs are dictated by where the course allows a safe changeover point, which means you might get 9km or 12km depending on which position you run.

Team sizes vary too. Four is the standard, but plenty of races offer teams of two (a half marathon each), and some run teams of up to six with correspondingly shorter legs.

The first thing to check: your specific race’s leg distances. Don’t assume it’s four equal 10.5km segments. Look them up before you assign anyone a leg, because a 12km leg and an 8km leg are meaningfully different assignments.

Why Run One

It’s a genuine entry point. A 10km leg is achievable for someone who runs a couple of times a week. That makes the relay the easiest way to get a colleague, sibling or partner to their first big race event without asking them to commit six months of their life.

You race, rather than survive. A marathon is an exercise in restraint. A relay leg is a race — you go hard, it hurts for 40-odd minutes, and then you’re done. Different, and for a lot of runners, more fun.

The atmosphere is the marathon’s. You’re on the same course, with the same crowds, the same road closures, the same finish line. You’re not at a side event.

It’s a way back in after injury. If you’ve had to pull out of the marathon, a relay leg lets you still be part of the weekend without the distance.

Accountability is real. Missing a training run when it’s only your goal at stake is easy. Three other people are waiting at a changeover point — that’s a different kind of motivation.

Building the Team

The team is the part that determines whether the day is brilliant or fraught.

Match the ambition, not the ability

Mixed-ability teams work perfectly well. What doesn’t work is mixed intent. If two people are chasing a time and two are there for the photos, someone ends up disappointed.

Have the conversation early and explicitly: are we racing this or enjoying it? Both are entirely valid. Confusion between them is not.

Nominate a captain

One person handles registration, communicates the leg assignments, holds the logistics plan, and answers questions on race morning. Relay entries usually require a team name and a single point of registration anyway, so this tends to happen by default — but make it deliberate.

Register early and check the rules

Relay places often sell out faster than the marathon itself. The 2027 Gold Coast relay entries went in three minutes.

Also check whether your team can be changed after registration — many races lock the roster once you’ve entered, which matters if someone gets injured in March.

Choosing Who Runs Which Leg

This deserves more thought than most teams give it, because the four legs are genuinely different jobs.

Leg 1: the start

Your first runner starts in the mass start with thousands of marathoners. That means congestion, a big-race atmosphere, and the challenge of not getting swept out too fast.

Give this to: someone with race experience and pacing discipline, or your most confident runner. It’s the leg where getting carried away costs the most.

Legs 2 and 3: the middle

These are the loneliest legs. Thinner crowds, fewer runners around you, and by the time leg 3 goes out the field has stretched considerably. There’s also the longest wait beforehand.

Give these to: self-sufficient runners who don’t need a crowd to keep them going. If your legs are unequal, this is usually where the longest one sits.

Leg 4: the finish

The anchor leg brings it home. Crowds build, the finish line is real, and your runner crosses it for the team — which is the moment everyone photographs.

Give this to: either your fastest runner, if you’re racing, or the person for whom finishing a marathon course would mean the most. There’s a strong argument for the second option.

One more consideration: leg 4 runs at the warmest time of day. If the race is anywhere hot, factor that in.

Training for a Relay Leg

The good news is that this is 10K training, not marathon training.

If you’re an experienced runner

Treat it as a 10K race. Six to eight weeks of specific work is plenty on top of an existing base — some threshold running, some intervals, and one longer run per week at 12-16km so the distance feels comfortable rather than maximal.

If this is your teammate’s first race

Build to 10-12 weeks. The priority is getting comfortably to 10km, not getting fast — three or four runs a week, one of them progressively longer, and no intensity until they can cover the distance without concern.

The realistic goal for a first-timer is to finish the leg feeling good. That’s it. The team result matters far less than whether they want to do it again.

Two relay-specific sessions

Practise running at your actual start time. If you’re leg 3 and won’t start until 10:15am, do some training runs at 10:15am. Your body’s readiness at that hour is not the same as at 7am, and neither is your eating.

Practise running after waiting. Sit around for two hours, then warm up and run 10km at effort. It’s an oddly specific session and it’s exactly what race day asks of you.

The Logistics Are the Hard Part

This is where relay teams come unstuck, and it has nothing to do with running.

Four people need to be at four different points along a 42km course, at four different times, on a morning when most of the roads are closed. It requires an actual plan.

Work it out in advance

• Read the race’s transport arrangements first. Most relays provide shuttle buses between changeover points. Some don’t. This single fact shapes everything else.
• Map each changeover point and work out how each runner gets there. Public transport is usually more reliable than driving on a road-closure morning.
• Estimate your changeover times using realistic paces, then add a buffer. If your leg 2 runner thinks they’ll take 50 minutes, your leg 3 runner should be in position 30 minutes before that.
• Agree a communication plan. Live tracking is standard at most big races and is the easiest way to know when your runner is approaching. Have a group chat, and make sure everyone’s phone is charged.
• Decide where you’re all meeting afterwards. Do this before race day, not by phone at the finish area with 20,000 other people.

The golden rule

Be at your changeover point far earlier than you think you need to be.

The nightmare scenario in a relay isn’t a slow leg. It’s a runner arriving at a changeover with nobody there to take over. Being 45 minutes early costs you nothing but a bit of standing around. Being five minutes late ruins the day for four people.

The Changeover

Different races handle this differently, so check yours — but the common formats are:

• A timing chip or band physically handed from one runner to the next
• A slap bracelet or baton passed at the changeover
• A designated zone where the incoming runner crosses a mat and the outgoing runner starts on their own chip

Whatever the system, practise it once beforehand. It takes two minutes and prevents the fumbled handover that costs you thirty seconds and a certain amount of dignity.

Practical points:

• Position yourself where your incoming runner can see you. Changeover zones are crowded and everyone looks the same in running kit — a bright top or a flag helps enormously.
• Start moving before the handover so you’re not going from stationary to race pace instantly.
• Confirm the handover happened. Don’t run off assuming.
• Incoming runners: step aside promptly. Other teams are trying to do the same thing.

Pacing Your Leg

The single most common relay mistake is running your leg like a marathon segment.

It isn’t one. You’re running 10km and then stopping. Pace it as a 10K race, not as a quarter of a marathon — that’s typically 30-45 seconds per kilometre faster than marathon pace, depending on your fitness.

Plenty of relay runners finish their leg thinking they could have gone considerably harder. That’s the standard error. Go out at 10K effort and hold it.

Two caveats. If your leg is unusually long — 12km rather than 10km — adjust slightly. And if you’re on leg 1, remember you’re starting in a marathon field where almost everyone around you is running much slower than you intend to. Trust your own pacing and don’t be pulled back by the crowd.

The Waiting Problem

Nobody warns first-time relay runners about this, and it’s the genuinely novel part of the day.

If you’re on leg 3 or 4, you may be waiting two, three or even four hours between arriving and running. In that time you’ll get cold, stiff, nervous and hungry — and then be asked to run a hard 10K.

How to manage it:

• Bring warm layers. You’ll be standing around, often in the early morning, often outdoors with no shelter. Bring more than you think.
• Eat properly, on a plan. A leg 4 runner starting at 11am needs a completely different fuelling approach from a leg 1 runner starting at 7am. Have breakfast, then a small snack roughly 90 minutes before your estimated start.
• Keep sipping. Steady fluid across the wait, rather than a lot right before you run.
• Warm up properly, and start it around 20-25 minutes before your expected handover. Easy jogging, some drills, a few strides. Cold legs at 10K pace is how people pull calves.
• Find the toilets early. The queues at changeover points are shorter than at the start, but they exist.
• Watch the tracking. It converts a vague wait into a countdown, which helps enormously with the nerves.

Common Mistakes

Not checking the leg distances. Assigning your least experienced runner a 12km leg because everyone assumed it was 10.5km each.

Running it like a marathon. You’re racing a 10K. Go harder.

Cutting the logistics fine. The one genuinely unforgivable relay error. Be early.

Not warming up. Two hours of standing still followed by an immediate 10K effort is an injury waiting to happen.

Mismatched expectations. Two people racing, two people taking photos, and nobody having agreed which it was.

Underdressing for the wait. You dress for the run, then stand in the cold for three hours before it.

Treating it as lesser. A hard 10K on a closed marathon course, run for three other people, is a real race. Prepare for it like one.

Where to Find Them

Marathon relays are increasingly standard at major race weekends. Among others, you’ll find them at the Gold Coast Marathon, the Rome Marathon (Run4Rome, four legs, one of which is open to runners aged 16 and over), the Melbourne, Ottawa and Vienna marathon weekends, and the Lavaredo trail festival.

They’re also common at corporate and charity race weekends, which is often the easiest way to assemble a team from a workplace.

Two things to check before entering any of them: the leg distances, and whether the roster can be changed after registration.

The Short Version

• Check your race’s actual leg distances before assigning anyone a leg
• Agree upfront whether you’re racing it or enjoying it
• Nominate a captain and register early — relay places go fast
• Leg 1 needs pacing discipline; legs 2 and 3 need self-sufficiency; leg 4 gets the finish line
• Train it as a 10K, not as marathon prep
• Be at your changeover point far earlier than feels necessary
• Bring far more warm clothing than you think you need
• Warm up 20-25 minutes before your handover
• Pace it as a 10K race — most people finish wishing they’d gone harder

The Bottom Line

A marathon relay gives you the best parts of a marathon weekend — the closed roads, the crowds, the finish line — for a quarter of the distance and none of the four-month build. It’s the most accessible way into a major race, and one of the few genuinely social things in a sport that mostly isn’t.

Sort the logistics, agree the plan, be early to your changeover, and run your leg properly. Do that and it’s one of the best mornings of the running year.

Got a relay in the calendar? Add it in RunningLog — set your goal, log your leg, and keep it alongside every other race you’ve run.

Run a marathon relay? Which leg did you get, and did you go hard enough? Share it on Instagram or Threads.