50 kmRoad🇿🇦 Hartbeespoort, South Africa

Om Die Dam Ultra Marathon

Saturday, 20 March 2027Estimated dateIn 5 months · Start 06:00

A 50 km road ultra that circles the Hartbeespoort Dam below the Magaliesberg, a popular Comrades build-up race on the Highveld.

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Facts checked 10 Oct 2026 against runningcalendar.co.za.

Elevation gain

600 m

Very hilly · ↓ 600 m

Highest point

1,350 m

above sea level

Temp at start

16°C

Peaks around 24°C

Entry fee

Check site

Open entry

Finishers

—

typical year

Course

Loop

7h cut-off

Getting thereFly into HLA (Johannesburg), about 24 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Very hilly: about 600 m of climbing and 600 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

16°C

Peak during race

24°C

Humidity

71%

Chance of rain

Wind

8 km/h

Race day in past years

Historical averages for 20 March ±3 days, 2016–2025, from 06:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/om-die-dam-50k" title="Om Die Dam Ultra Marathon on iRun42"><img src="https://irun42.com/badge/om-die-dam-50k.svg" width="300" height="120" alt="Om Die Dam Ultra Marathon: course, elevation and race-day weather on iRun42" /></a>