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Bigger Isn't Always Better

There's no denying it – running is booming. From local parkruns to major marathons, participation is soaring, race entries are selling out in record time, and running clubs are attracting new members. While the pandemic undoubtedly reignited interest in the sport, its soaring popularity can largely be attributed to Gen Z, who are rediscovering running as both a fitness activity and a social experience.
As demand continues to grow, race organisers have responded by increasing field sizes and expanding their events. In 2027 the TCS London Marathon will be a two-day event for the first time in its history, allowing a record 100 000 participants to take part. Additional start waves helped the Boston Marathon accommodate 29 033 finishers this year, marking its largest number of finishers since 2014. The 2027 Tokyo marathon will accept 40 000 runners, up from 39 000 in previous editions. Locally the ever popular Two Oceans Marathon recently announced that, from 2027, both its Half Marathon and 56km Ultra Marathon will expand to fields of 21 000 runners each, up from the current limits of 17 000 and 14 000 respectively.
Not every race has chosen to grow however. Despite unprecedented demand that saw entries for the 2026 Comrades Marathon sell out in less than 10 hours, the Comrades Marathon Association reduced the race's entry cap from 24 000 in 2025 to 22 000 in 2026 rather than following the trend towards bigger fields, citing runner safety, operational requirements and the need to preserve the participant experience.
There are strong arguments for both sides.
As participation grows, expanding capacity can:
• Meet demand: Popular races often sell out quickly, leaving many runners disappointed.
• Generate more revenue: More entries can help fund better infrastructure, prize money, and community initiatives.
• Grow the sport: Allowing more people to participate can encourage new runners and strengthen the running community.
• Benefit local economies: More runners usually mean more visitors spending money on accommodation, restaurants, and local businesses.
• Financial benefits: Bigger fields can mean economies of scale for infrastructure and allow for bulk discounts from suppliers.
However a larger field can also create challenges:
• Congestion: Crowded starts and narrow sections can make the race less enjoyable and affect finishing times.
• Safety risks: Medical services, hydration stations, toilets, transport, and crowd management all need to scale with participant numbers.
• Loss of atmosphere: Some races are popular because they offer a premium, well-organized experience. Growing too quickly can dilute that.
• Environmental impact: More participants increase pressure on roads, trails, parks, and local communities.
• Volunteer and operational strain: Recruiting enough marshals, aid station volunteers, and logistics staff becomes more difficult.
The decision to increase a race's field size is far more complex than it may appear. Race organisers must first consider a number of critical questions:
• Can our route safely accommodate more runners?
• Can we provide the same quality of experience?
• Can our transport, parking, baggage, and medical services cope?
• Will runners still want to come back next year?
• Will the character of the race and participant experience remain with a bigger field?
If the answer is yes, then increasing the field size can be a positive step. If not, maintaining quality may be the wiser choice.
To manage growth sustainably however, some race organisers have expanded in ways other than simply accommodating more runners in a single race by:
• Introducing wave or rolling starts.
• Adding a second race day or weekend festival.
• Offering additional distances (5km, 10km, half marathon, etc.).
• Using a ballot system to manage demand.
• Rotating entry opportunities for first-time participants and returning runners.
The running boom presents an incredible opportunity for race organisers, but bigger doesn't automatically mean better. The challenge is to grow in a way that enhances, rather than compromises, the participant experience. Ultimately, the races that will stand the test of time are those that strike the right balance between increasing capacity and maintaining the quality that made them popular in the first place.
What do you need help with as an event organiser? If there is an area of organising you would like to know more about, send a mail to tim@finishtime.co.za and we will see if we can find some info for you.
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