Course guide & time predictor
Houston Marathon
Houston, TX
Flat, fast, and January-reliable
Elevation gain
100 ft
Course difficulty
0.1% slower than Berlin
Race month
January
See how your time translates to Houston Marathon
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About the race
The Houston Marathon is one of the fastest courses in the US and one of the best-kept secrets for a clean BQ attempt. It runs through downtown Houston and along Buffalo Bayou in the heart of January — cold enough to race hard, flat enough to execute a plan. The race is well-organized, with a 10K and half marathon run simultaneously that keeps the atmosphere energetic throughout.
Course profile
The course is essentially flat throughout, with only minor undulations along Buffalo Bayou and through downtown neighborhoods. Total elevation change is negligible. There are no bridges, no significant hills, and no technical sections. Aid stations are plentiful and well-organized. If you have a pace plan and the fitness to execute it, nothing on this course will derail you.
Race-day conditions
January in Houston is typically 40–55°F at the start — ideal racing weather. Humidity is the main variable; Houston's Gulf Coast location means even winter mornings can feel muggy at 85–90% humidity. Watch the dewpoint, not just the temperature. A dewpoint above 55°F will slow you down even in cool temps. In most years conditions are favorable; in occasionally warm years (60°F+), adjust your target.
Using the predictor
Houston runs about 0.1% slower than Berlin — essentially flat-course equivalent. Your predicted time should translate almost directly. This is one of the most honest courses to bring a BQ target to: the terrain won't help you or hurt you, and the January weather is as reliable as marathon weather gets in the US. If you've done the training, run your number.
Boston qualifying standards
Houston's flat course and reliable January weather make it a strong BQ venue. The standards below are the official BAA minimums — the effective cutoff typically runs 5–7 minutes faster than the published standard, so plan to beat your age-group time by a meaningful margin.
| Age group | Men | Women |
|---|---|---|
| 18–34 | 3:00:00 | 3:30:00 |
| 35–39 | 3:05:00 | 3:35:00 |
| 40–44 | 3:10:00 | 3:40:00 |
| 45–49 | 3:20:00 | 3:50:00 |
| 50–54 | 3:25:00 | 3:55:00 |
| 55–59 | 3:35:00 | 4:05:00 |
| 60–64 | 3:50:00 | 4:20:00 |
| 65–69 | 4:05:00 | 4:35:00 |
| 70–74 | 4:20:00 | 4:50:00 |
| 75–79 | 4:35:00 | 5:05:00 |
| 80+ | 4:50:00 | 5:20:00 |
In 2024, the cutoff was 5 minutes 29 seconds faster than the qualifying standard. Plan to beat your standard by at least 5 minutes to have a strong chance of registration.
Common questions
Is the Houston Marathon a good course for a Boston qualifier attempt?
Yes — Houston is one of the best BQ courses in the US. With negligible elevation change and reliable January weather, it's essentially equivalent in difficulty to Berlin (0.1% slower). The main caveat is humidity: even at 45°F, a high dewpoint can affect performance. Check the dewpoint forecast, not just the temperature, in the days before the race.
Why isn't Houston more well known as a fast marathon?
Houston is somewhat overshadowed by CIM (December) and the World Marathon Majors, but among experienced runners it's a well-regarded qualifier. It's smaller than Chicago or NYC (roughly 8,000 finishers), which means less hype, but the conditions and course make it genuinely competitive with the biggest names for flat-course BQ attempts.
How does Houston humidity affect marathon performance?
Humidity matters even in cold weather. A dewpoint above 55°F raises the perceived effort and limits evaporative cooling, slowing runners even when the air temperature is ideal. Houston's Gulf Coast location means winter mornings can be 45°F with 90% humidity — which feels comfortable but affects performance. The wet-bulb temperature calculator in this tool accounts for humidity automatically.