Note: this article deals with the 2025 Boston Marathon. For the current prediction for the 2026 Boston Marathon, see this article. Friday, the registration period for the 2025 Boston Marathon came to a close. Along with many others, I was eagerly waiting to see if they would release the number of qualified applicants. They didn’t. … Read more
Registration for the 2025 Boston Marathon is drawing to a close, and over the past week I’ve seen a lot of the same questions come up over and over again. It will still be another week or two before acceptances and rejections go out, and it’s likely these same questions will continue to circulate. So … Read more
After a record number of qualified applicants applied to run the Boston Marathon in 2024, there has been plenty of talk about what will happen in 2025. I made a prediction about the cut-off time here (7:03), and I added some additional data and context here. With the registration period under way, runners are eager … Read more
Update: Now that BAA has released the number of applicants, I’ve published a brief follow up here. Last week, I shared a prediction for the 2025 Boston Marathon cut-off time – 7:03. If you haven’t read that article, you may want to read that first to get some context. Since then, I’ve gotten some feedback … Read more
Although much of what I write is freely available on this website, I tend to publish my data-intensive running articles on Medium – either in Runner’s Life or In Fitness and In Health. These articles are time intensive to research and by publishing them there, I’m able to be compensated for my work. But the … Read more
The weather at this year’s Boston Marathon was warm – not crazy hot, but warm enough that it had a negative impact on runners’ performances. In conversations around the race, I heard a claim that piqued my interest – the heat had a worse impact on runners coming out of the winter. For many runners, … Read more
In this post, you’ll find a collection of data visualizations related to the Boston Marathon. These data visualizations have all been created with Flourish. It’s a website where you can create and share amazing data visualizations. I’ve included the links to the visualizations below. Feel free to use them in your own work, but please … Read more
To use the calculator below, enter the runner’s age in years, select their gender, and enter their finish time in the format H:M:S (i.e. 3:45:42). The results will include: Continue reading below for some additional context. Note: You must enter an age between 20 and 79. The age grades are calculated with the 2025 age … Read more
Note: This list is based on data from 2023, and there have been some changes since then. Refer to this post for the latest list of the largest marathons in the United States. Most people know that the New York City Marathon is the biggest race in the country. But have you ever wondered about … Read more
Note: This list is based on data from 2022, and there have been some changes since then. Refer to this post for the latest list of the largest marathons in the United States. I’m sure you’ve got some idea what the largest marathon in the US is. Everyone knows that the New York City Marathon … Read more