Sioux Falls Marathon
Sioux Falls, United States of America · Sunday 20 September 2026
The Sioux Falls Marathon is an annual long-distance running event held in Sioux Falls, South Dakota, featuring a range of distances including a full marathon, half marathon, relay, and a 5K. The marathon course is USATF certified, making it a Boston Qualifying Race, and is organized by the Sioux Falls Sports Authority. The event typically draws over 2,000 participants across all distances, with more than 1,000 finishers in the half marathon alone.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:03:11
Time difference: +3.2 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain132m
Elevation High462m
Elevation Low406m
Weather Forecast
High26°C
Low11°C
Chance of Rain32%
How hard is Sioux Falls Marathon?
Moderateharder than 51% of marathons
Flattest / easiestHardest
On our difficulty model, Sioux Falls Marathon plays about 7 minutes slower than an average road marathon for a 3:30 runner. It ranks #558 hardest of 1150 marathons we analyse, and #299 of 575 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Sioux Falls Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Sioux Falls Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:00:17 | +00:17 |
| 3:30:00 | 3:31:41 | +01:41 |
| 4:00:00 | 4:03:11 | +03:11 |
| 4:30:00 | 4:34:48 | +04:48 |
| 5:00:00 | 5:06:30 | +06:30 |
| 5:30:00 | 5:38:17 | +08:17 |
| 6:00:00 | 6:10:10 | +10:10 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Sioux Falls Marathon 2026 Course Analysis
Sioux Falls Marathon is a full marathon held in Sioux Falls, United States of America. It is scheduled for Sunday 20 September 2026. The course is run on road surface with 132m of total climbing, with its high point near 462m above sea level. For registration and full race details, visit the official Sioux Falls Marathon website.
Elevation Profile
With 132m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for September, the expected race day conditions are as follows. Moderate temperatures between 11°C and 26°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a moderate chance of rain (32%). Runners may want to prepare for wet conditions but shouldn't expect persistent rainfall.
Surface Type: Road
Sioux Falls Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Sioux Falls Marathon against other marathons to find the right race for your goals.
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If Sioux Falls Marathon fits your goal, these courses play out about the same on our difficulty model.
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