World Marathon Majors Ranked by Size (And Why It Matters)
TL;DR
300K+ runners completed a World Marathon Major in 2025. New York leads with 59,226 finishers. For sportswear brands, Majors are the most concentrated recurring demand signal in sport.
The World Marathon Majors aren't just races anymore—they're the biggest live participation engines in global sport. In 2025 alone, more than 300,000 runners crossed a Major finish line, turning seven city streets into the world's largest recurring live events and some of the most valuable platforms for running apparel, footwear, and accessories.
New York now holds the world record with 59,226 finishers, narrowly edging out London's 56,640 and Chicago's 54,351 as the largest marathons ever recorded. Berlin, Tokyo, Sydney, and Boston still deliver tens of thousands of committed runners each—with very different dynamics, from qualification-only prestige in Boston to breakout growth in Sydney as the newest Major.
For sportswear brands, those fields represent a uniquely concentrated demand signal: hundreds of thousands of runners training 4–6 months for a single day, buying race kits, layering in weather-specific gear, and showing up in head-to-toe performance outfits that double as social proof.
