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Race Science

Your Home Airport Decides Your Race Calendar More Than Your Fitness Does

Changing one variable — where the athlete flies from — moved the travel difficulty on 73 of 196 races. Not one course changed. It is the biggest input to race selection that almost nobody scores.

Race Science · 5 min read
ONE HOME-AIRPORT CHANGE · 196 RACES · ZERO COURSE CHANGES 73races changed score 123unchanged WHAT MOVED Domestic access broadly improved International access improved or held Proximity races the only real loss — drivable became flown Course attributes unchanged — no swim, bike, run or climate value moved
Rescoring 196 races after a single home-airport change. The course attributes did not move at all.

Athletes choose races by course. Flat or hilly, wetsuit-legal or not, hot or temperate, sea or lake. All of that is real, and all of it is about the race.

Then there is the variable that is not about the race at all, and it may matter more: where you are flying from.

When the travel difficulty of 196 destination races was rescored after an athlete relocated from one home airport to another, 73 races changed score. No course was altered. No date moved. No swim got warmer. The only thing that changed was the starting point, and it reordered more than a third of the calendar.

The direction of the change is the surprising part

The intuition most athletes carry is that a big coastal gateway is the best base for international racing. Coasts have long-haul flights; inland cities connect.

That intuition is mostly wrong, and it is wrong for a structural reason. For a destination race, the binding constraint is almost never the first leg. It is the long-haul leg. A large inland hub with enormous domestic depth can feed you into more long-haul gateways than a coastal airport with a handful of its own international routes. Domestic breadth converts into international optionality.

What actually got worse in the move was narrow and specific: the races that had been close enough to reach without flying at all. Those had been scoring at the very top — not because the flights were good, but because there were no flights. Lose proximity and you lose the best travel situation there is.

Why a drivable race beats everything

The highest-value finding in the whole exercise is unglamorous. A race you can drive to is categorically easier than a race you can fly to cheaply.

The bike rides in the car. There is no bike box, no baggage handling, no weight limit, no oversize counter, no connection, no possibility of arriving without your equipment. You can pack the day before and leave when you want. The number of things that can go wrong drops to roughly the number of things that can go wrong on a drive.

Most athletes never score this. They will drive four hours to a training camp without thinking about it and then fly to a race of the same distance because the race is "a real race". The drive radius around your home is the cheapest race inventory you own, and it is usually under-raced.

What to do with this

Score access before you fall in love with a course. It takes ten minutes and it is the difference between a race you will actually do well at and a race you will arrive at depleted.

Three questions cover most of it. Is there a nonstop into the country the race is in, or does the plan require changing planes in a third country? How many legs is it, door to start line? And is there a version of this race — a similar course, similar month, similar distance — inside driving range that you are ignoring because it is less famous?

That last question is the one that changes seasons. The travel is not a tax you pay to get to the race. For a destination race, the travel is part of the race.

Key takeaways

  • Rescoring 196 races after one home-airport change moved 73 of them. No course changed; only the starting point did.
  • Coastal gateways are not automatically better for international racing. The binding constraint is the long-haul leg, and a domestically deep inland hub can feed more long-haul gateways.
  • The clearest loss from any relocation is proximity — races that were drivable and are now flown.
  • A drivable race is categorically easier than a cheap flight: no bike box, no baggage handling, no connection, no chance of arriving without your equipment.
  • Score access before you commit to a course: foreign plane change or not, how many legs door to start line, and what comparable race sits inside driving range.

Sources

The 73-of-196 figure is an internal rescoring exercise conducted in August 2026, applying a consistent access rubric before and after a single change of home airport. It is offered as evidence that access is a high-variance input to race selection, not as a general statistic.

Part two of a three-part series on race travel. Previously: We Checked 330 Race-Travel Routings. 38 Didn't Exist.. Next: The Fastest Route to Your Race Is Usually the Worst One for Your Bike.