One of Europe's most iconic mass-participation road races is about to change hands. The City of Paris has selected a new consortium called Cadence to take over organization of the Marathon de Paris and Semi-Marathon de Paris, ending a concession relationship with ASO that dates back to 1998. If you've raced Paris, or have it on your list, this matters.
The decision still requires formal administrative validation, but the direction is clear. ASO, the organization behind the Tour de France and the Dakar Rally, will lose its grip on a race it has managed for nearly three decades. That's not a routine contract renewal. That's a structural shift in how one of the world's major marathons will be run.
Who Is Cadence, and Why Does It Win?
Cadence is a consortium made up of three partners: Keneo, a sports events specialist; OSE, an event production company; and an agency connected to Havas Group, one of the largest global communications and marketing networks. The combination suggests Paris isn't just looking for a new operations team. It's looking for a rebrand.
Havas's involvement signals that the City of Paris wants a stronger media and sponsorship architecture around the race. Keneo brings operational depth in large-scale sporting events. OSE adds production expertise. Together, Cadence represents a bid focused not only on logistics but on the commercial and experiential future of the event.
For context: the Marathon de Paris typically draws around 50,000 registered runners each year, making it one of the largest marathons globally by field size. Entry fees, sponsorship, and broadcast exposure tied to that number represent significant financial stakes. The concession to manage that is not a small contract.
What ASO Built Over 28 Years
It would be unfair to minimize what ASO delivered. Since taking on the concession in 1998, the organization grew the Marathon de Paris into a fixture on the global race calendar. The course through central Paris, passing the Eiffel Tower, running along the Seine, and finishing near the Arc de Triomphe, remains one of the most visually distinctive marathon routes in the world.
ASO also expanded the portfolio to include the Semi-Marathon de Paris, which has grown into one of Europe's largest half marathons. The organization brought operational rigor from its experience running professional cycling and off-road events at scale.
But criticism accumulated over the years. Runners and industry observers pointed to slow innovation in runner experience, a registration process that frustrated international participants, and a race-day infrastructure that, while functional, felt dated compared to newer races investing heavily in technology and personalization. The City of Paris, which owns the concession, appears to have factored that in.
What This Means for the Race Format
Nothing changes immediately. ASO's current concession runs through its natural term, and Cadence won't assume full control until the administrative process is complete and the transition is managed. Runners registered for upcoming editions should not expect disruption to the near-term calendar.
Longer term, however, you should expect change. When a new organization takes over a race at this scale, the areas most likely to shift are branding and visual identity, registration systems and international accessibility, race-day experience including timing, corrals, and finish-line infrastructure, and sponsorship partnerships that affect everything from expo quality to post-race recovery zones.
Cadence's composition suggests a particular appetite for upgrading the media and marketing side. If you've watched how Abbott World Marathon Majors events have raised production standards globally over the past decade, with on-course cameras, broadcast deals, and digital tracking becoming increasingly sophisticated, the pressure is on any major marathon to match that. Paris has lagged. Cadence looks like a deliberate attempt to close that gap.
What Runners Should Watch
If you're planning to race Paris in the next one to two years, here's what to track closely:
- Registration changes: International runners have sometimes found the Paris registration process opaque. A new organizer may overhaul the entry system, including how international guaranteed entries and charity places are structured.
- Pricing: Entry fees for the Marathon de Paris have typically sat in the $130 to $160 range for standard registration. A rebrand under new commercial leadership could push prices upward, particularly for international entry categories. Watch the first registration window Cadence controls.
- Course and timing: There's no indication the course itself will change. Altering the iconic Paris route would be politically and logistically complex. But timing chip systems, start corrals, and baggage logistics are areas a new organizer could upgrade relatively quickly.
- Sponsorship profile: Havas Group's involvement almost certainly means a more aggressive commercial strategy. Expect new title sponsors, potentially new brand activations on course, and a stronger digital and broadcast presence.
The Semi-Marathon de Paris is equally affected. It shares the concession and will go through the same transition. If you're using Paris as a spring half marathon target, the same unknowns apply.
The Bigger Picture for Global Mass-Participation Racing
This isn't just a Paris story. The management of major city marathons is under scrutiny globally. Cities are reconsidering whether long-term concessions to a single operator serve the public interest and the sport's development, or whether competitive tendering produces better outcomes for runners and local communities.
The London Marathon, for example, operates under a charity-linked structure that keeps commercial pressure in a different relationship with mission. Chicago, New York, and Boston sit within the Abbott WMM ecosystem. Paris, as a non-Major, has had more flexibility in how its concession operates. But that flexibility also meant less accountability pressure over time.
The shift to Cadence reflects something broader: cities and race organizers are increasingly treating mass-participation running events as media properties, not just logistics operations. The runner experience, the broadcast product, and the sponsorship inventory are all being reconceived together. If you've watched how newer races and fitness events have invested in production quality, that pressure is moving upstream to legacy events like Paris.
On the athlete side, the marathon market is also being shaped by shoe technology that continues to push performance boundaries. Understanding how far shoe tech can actually push marathon limits matters for any runner targeting a Paris personal best, regardless of who's organizing the race.
Training approaches are also evolving alongside organizational changes in the sport. Programs like Xtep's PB Master Program for marathon runners reflect an industry increasingly focused on structured, performance-oriented preparation that meets runners where they are in the global market.
Should You Still Race Paris?
Yes. The transition doesn't change why Paris is worth racing. The course is genuinely special. Running through central Paris on closed roads, with a field of 50,000 people and millions of spectators, is a different experience from most marathons. That doesn't go away because the organizer changes.
What you're watching for is whether Cadence improves the parts of Paris that have frustrated runners. If the new group delivers a cleaner registration process, better race-day infrastructure, and a stronger international profile, Paris could move meaningfully up the global race rankings. If the transition is messy or purely cosmetic, the fundamentals stay the same.
Nutrition preparation remains critical regardless of the organization. Whether you're building base or peaking for a spring marathon, the 2026 guide to running nutrition covers practical fueling strategies that apply to road marathon training and race day execution.
And if you're thinking about the broader running calendar alongside Paris, the conversation around Boston 2026 qualifying standards is worth following as you map out your race year.
What Happens Next
The formal validation process is the immediate next step. Once Cadence's concession is confirmed, expect an official announcement about the transition timeline, which is likely to include a joint communication period with ASO to manage the handover of operational systems, sponsor relationships, and runner data.
The first Marathon de Paris fully organized by Cadence will be the clearest signal of what the new chapter actually means. Until then, the selection decision itself is the story. Twenty-eight years is a long run. Paris has decided it's time for something different.