What is a good marathon time? Percentiles from 6.4 million finishers
Real percentiles by sex and age from 6.48 million marathon results in the Labthlete dataset: what beats the median, what puts you in the top 10%, and how rare sub-3 really is.
The median marathon finish across 6.48 million race results in the Labthlete dataset is 4:16:35. Breaking 3:43 beats 75% of finishers, breaking 3:17 beats 90%, and only 4.4% of marathoners go under three hours.
“Good” only means something against a real distribution. Most published averages come from a single race or a survey; the numbers below come from 6,484,071 marathon finishes in the Labthlete data lake, aggregated across public results from hundreds of races. Here is the whole field, in one table.
| To beat this share of the field | You need |
|---|---|
| 50% (the median) | 4:16:35 |
| 75% | 3:43:14 |
| 90% | 3:17:22 |
| 95% | 3:02:38 |
Landmark times, since that is how runners actually talk about the marathon: 4.4% of all finishers break 3 hours, 16.8% break 3:30, 38.7% break 4:00, and 76.4% break 5:00.
Men and women
| Percentile | Men (4.26M) | Women (2.16M) |
|---|---|---|
| Median | 4:05:28 | 4:36:37 |
| Top 25% | 3:34:47 | 4:01:32 |
| Top 10% | 3:10:06 | 3:37:38 |
| Top 5% | 2:57:41 | 3:24:57 |
By age, where it gets interesting
The common belief is that the marathon slows steadily with age. At the recreational level the data disagrees: median times barely move between 20 and 49. The fade only becomes visible from the 50s, and even a 60 year old man at the median finishes in 4:40.
| Age | Median | Top 25% | Top 10% | n |
|---|---|---|---|---|
| 20 to 29 | 4:00:20 | 3:30:07 | 3:02:44 | 711k |
| 30 to 39 | 3:58:52 | 3:29:09 | 3:04:13 | 1.23M |
| 40 to 49 | 4:01:20 | 3:32:48 | 3:10:47 | 1.18M |
| 50 to 59 | 4:16:52 | 3:45:25 | 3:23:39 | 667k |
| 60 to 69 | 4:40:25 | 4:03:38 | 3:41:47 | 204k |
| Age | Median | Top 25% | Top 10% | n |
|---|---|---|---|---|
| 20 to 29 | 4:29:52 | 3:57:44 | 3:33:12 | 502k |
| 30 to 39 | 4:32:17 | 3:58:06 | 3:33:21 | 630k |
| 40 to 49 | 4:36:31 | 4:01:23 | 3:39:04 | 547k |
| 50 to 59 | 4:50:39 | 4:14:41 | 3:50:58 | 263k |
| 60 to 69 | 5:10:30 | 4:31:46 | 4:06:35 | 66k |
How to use these numbers
Percentiles tell you where a time sits; they do not tell you what you can run. That depends on your thresholds, your durability and the course. The free Labthlete predictor simulates your race from those inputs, and the full app places your predicted time inside the actual finisher distribution of the race you are targeting.
Frequently asked questions
Is a 4 hour marathon good?
Yes. A 4:00:00 finish beats the median marathoner in our 6.48 million result dataset (median 4:16:35) and roughly 61% of all finishers. For women it beats 76% of the female field.
What marathon time puts you in the top 10%?
About 3:17 across all finishers. Split by sex, the top 10% starts around 3:10 for men and 3:38 for women.
How rare is a sub 3 hour marathon?
Only 4.4% of the 6.48 million finishes in the dataset broke three hours: 6.2% of men and 0.9% of women, about 1 in 110.
Does age change what counts as a good time?
Less than most people expect until the mid 40s: median times for men are nearly flat from 20 to 49 (4:00 to 4:01), then drift upward, reaching 4:40 for men in their 60s. The tables above give median, top 25% and top 10% for each decade.
The free Labthlete predictor simulates your race from your own physiology: watts, thresholds, durability and the course. No account needed.
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