Registering for a race with a well-earned reputation for selling out takes a little more planning than a typical race sign-up. Here's how the process for Indianapolis Monumental generally works, based on how the race has run registration in recent years, so you can go in with a plan instead of scrambling once you notice a distance is filling up.

How registration works

Registration for the marathon, half marathon, and 5K typically opens at the very start of the calendar year and stays open through the fall, closing either shortly before race weekend or as soon as a given distance sells out, whichever comes first. In recent years, the marathon distance in particular has been selling out well ahead of that fall closing window, so treating the opening of registration as a soft deadline, rather than something to get around to later, is the safer approach if you have your heart set on a specific distance.

Pricing tiers and why timing matters

Like most large marathons, entry fees here are staged in tiers that increase over time, and the race has structured its tiers to move up either on a set date or once a percentage of the field for that distance is filled, whichever happens first. That second condition matters more than it sounds: it means a tier can end early if demand is strong, independent of the calendar date originally posted. Registering earlier in the year generally means paying less and having a materially better chance of getting a spot at all, rather than just paying less.

Registering at the expo, if spots remain

In years when a distance hasn't sold out in advance, the race has historically kept limited in-person registration open at its race-weekend health and fitness expo, subject to availability. This is a real option but not a reliable plan — it depends entirely on whether that year's field still has room, and for the marathon distance specifically, recent years suggest that's an increasingly unlikely bet.

What to do before you register

Because tiers and availability can shift with little warning, it's worth deciding on your goal distance, your travel plans, and your budget before registration opens rather than during a scramble once you see a tier about to close. If you're weighing this race against your training calendar or comparing it with other fall marathons, doing that thinking ahead of time means you're ready to register the moment the field opens rather than losing a pricing tier, or a spot, while you're still deciding.