If you’ve ever run a large half-marathon or marathon, you’ve probably noticed a few runners in official race kits, holding tall signs with projected finish times printed on them.
At the start line, small crowds tend to gather around them, and once the race begins, that pack often moves together in a tight formation.
So, what’s with the signs—and why do so many runners stick with these groups?
Welcome to the world of marathon pacers.
Pacers are experienced runners tasked with running an even, predetermined pace to hit a specific finish time. Their job is to guide runners through the course consistently—removing the guesswork from pacing—so participants can focus on running, fueling, and enjoying the race.
In this guide, we’ll break down exactly what marathon pacers do, the pros and cons of using one, and our best tips for making the most of a pacer so you can cross the finish line feeling strong in your projected time.
What Is a Pacer?
A pacer is an experienced runner tasked with running at a steady, predetermined speed to achieve a specific finish time, helping other participants maintain their goal pace without constantly checking their watch.
For example, a smaller marathon might have pacers for finish times like 3:00, 3:15, 3:30, 3:45, 4:00, 4:15, 4:30, and so on up to 5:30. Larger races may offer pace groups every five minutes and cover a wider range of times. You can usually find pacing details at the race expo or in the marathon’s FAQ.
Official pacers are appointed by race organizers—often as volunteers—and assigned a target time well within their ability, typically slower than their personal best. This ensures they can comfortably lead while offering encouragement and support.
For instance, a pacer for the 4:00 group might have a marathon PR of 3:30.
Most big marathons and half marathons have multiple pacers, each leading a different pace group.
Major events like the New York City or Chicago Marathon may even have two to four pacers for popular finish times (such as 3:30 or 3:45) to better manage large groups and provide backup if one pacer has to drop out.
By running with a marathon pacer, athletes can take the mental load off pacing—no need to track splits or adjust speed—just “switch off” and follow the pacer. These groups are often referred to as a pace team or pace group.
For example, if your goal is a 3:35 marathon, you could join the 3:35 pace team from the start and let them guide you to the finish. Whether in a marathon or a shorter race, joining a pace team offers several potential benefits for performance, confidence, and race-day strategy.
What Are The Benefits Of Running With Pacers?
#1: Takes Out the Guesswork
The primary reason runners choose to run with pacers is that it’s often a better insurance policy for running an even-split race and at the speed they need to maintain to hit their goal time.
Pacers are experienced runners who are skilled at finding the right pace and then settling into it, running consistently and steadily for the duration of the race.
In contrast, many first-time marathoners, or even experienced runners who get anxious on race day, tend to go out way too fast in longer races, only to crash in the later miles. This can lead them to fall short of their running goals.
Running with a pacer takes the guesswork out of the equation, allowing you to turn off your brain and not have to focus on your watch. The pacer is entirely focused on getting you to maintain the right splits to get you to the finish line at the posted time.
Marathon pacers were particularly useful before GPS running watches became mainstream since they now allow instantaneous data about your marathon pace.
However, even with the ubiquity of GPS watches, running with a pacer is still a good way to take the pacing brainwork out of the equation of the challenges you have to juggle during the marathon, freeing up mental energy to focus on running well.
#2: Provides Support
Marathon pacers do more than just hold the pace group to the correct running speed.
They also provide moral support and encouragement, chatting with, cheering for, and distracting their pace group to help them through the race.
Running with a pacer often gives runners the boost of motivation to stay positive and mentally engaged in the race, especially when negative self-talk and moments of defeat strike.
#3: Helps Runners Get PRs
Running with a pacer can be a good way to reach a PR.
Marathon pacers typically run even splits. This pacing strategy is particularly effective at achieving a fast finish time, but it can be very challenging to implement on your own.
If you go out too fast, you can run out of steam and really slow down in the second half of the race.
Similarly, if you set out to run negative splits (a slower first half and a faster second half), it can be hard to pick up the pace at the halfway point because you’re likely already feeling fairly tired at the pace you are running.
#4: Answering Questions
Marathon pacers are experienced runners and usually also familiar with the course you are running, so they can be great resources for information about the race.
For example, they might be able to tell you that there’s a large hill coming up or that all the rest of the miles are flat or somewhat downhill.
This information can help you budget your energy and mentally prepare for what’s to come.
#5: Clearing the Way
If you’re running a crowded marathon, running with a pacer can be a good way to avoid weaving in and out of other runners and fighting your way through throngs of competitors.
Generally speaking, marathon pacers command the group from the front, asking other runners on the course to move to one side of the road or the other (as they continue running) to clear room for the coming pace group.
In this way, the other runners in the race yield to the pace group, saving you from weaving in and out of runners randomly strewn about the course who are paying no attention to you and the shortest tangents you want to be running.
Tips For Running With a Pacer
Introduce yourself and share your goals
Before the race or at the start line, let your pacer know your target finish time, pacing concerns, and any questions you might have. This helps them offer specific guidance, encouragement, and mid-race check-ins.
Run your own race in the first miles
Even though pacers are trained to start at the correct speed, adrenaline and crowd surges can make the first mile or two feel chaotic. Glance at your watch occasionally to confirm the pace aligns with your plan, especially if your watch measures in a different system than the pacer is calling out.
Position yourself strategically
Standing directly beside or just behind the pacer ensures you can hear their instructions and maintain the correct rhythm. Hanging too far back in a large pace group can mean you’re forced to surge to keep up, which wastes energy.
Be mindful of aid stations
Pacers often have a set plan for water or gel stops, but don’t assume it matches yours. If you need to slow down or walk through an aid station, communicate your plan so you can rejoin smoothly without a sprint.
Adjust if it’s not working for you
If the pace feels too easy or too hard, don’t be afraid to break away and run your own race. The pacer is a guide, not a boss—you’re still in control of your race.
Use the pacer’s cues and energy
Listen for their time checks, encouragement, and course tips. Many pacers are veterans who know where the tough spots are and can help you mentally prepare for them.
Respect the pace group space
Running shoulder-to-shoulder in a large group can create congestion. Stay aware of your surroundings and avoid clipping heels or blocking other runners.
Thank your pacer
Whether you stick with them to the finish or part ways mid-race, a quick thanks goes a long way. Pacers volunteer their time and energy to help other runners hit their goals.
Is Using A Pacer The Right Choice For You?
Many runners love the experience of running with a pacer, finding that it boosts both their performance and enjoyment. Pacers can take the guesswork out of pacing, provide steady encouragement, and create a sense of community within the pace group.
If you thrive in a team environment or enjoy the energy of running in a pack, a pace group can offer the camaraderie and support you crave. For beginners or first-time marathoners, pacers are especially helpful for keeping the early miles in check and preventing the all-too-common mistake of starting too fast.
However, running with a pacer isn’t for everyone.
If you prefer to set your own rhythm, adjust pace on the fly, or enjoy solitude on race day, you might find a pace group too confining.
Another drawback is the limited range of pacing options. For example, if you’re aiming for a 3:25 finish but the closest groups are 3:15 and 3:30, you’ll either be forced to run too fast and risk burnout, or run slower and have to make up time later—often a tough ask in the final miles.
It’s also worth remembering that pacers are human. While they aim to run consistent splits, unexpected factors—weather, crowds, or their own race-day issues—can throw off the plan.
And because pacers typically run an even-split strategy, their approach might not match yours. You may want to start conservatively and negative split, or stop at aid stations the group runs past.
Ultimately, pacers are a fantastic resource when their pacing style and goal align with yours, but they work best when you see them as a guide—not a rulebook—for your race.
Deciding whether to use a pacer is a personal decision, but the good news is that it’s free and non-binding—you can always disassociate from the group even if you’ve started with them.
Pacers are there as a tool to help you, but it’s still your race. You can use the service with gratitude to choose to do your own thing; both are totally valid choices.
Looking to improve your marathon PR? Take a look at our marathon training resources to help get you there:
