Race Shape › Calculators › Om Die Dam 50 km time predictor
Om Die Dam 50 km · Saturday, 13 March 2027 (expected)Om Die Dam 50 km time predictor
Om Die Dam is a 50 km ultra at about 1 160 m, around Hartbeespoort Dam — for many Gauteng runners their first ultra and a Comrades build-up. Type your own numbers and get a predicted finish, corrected for the altitude you train at.
| Distance | 50 km |
|---|---|
| Race altitude | 1 160 m |
| Even-pace halfway | 2:31:37 |
| Your fitness (VDOT) | 35.2 |
Flat-course physiology plus an altitude correction. Hills, heat and pacing are not modelled, and past the marathon the time follows how real ultra fields finish: allow for the course.
Racing it well
Fifty kilometres is past the marathon, so the time follows how real ultra fields finish, not a formula. Practise your Comrades fuelling and walking strategy here: that is the best use of it.
What the prediction includes
Your fitness from the race you type (Daniels’ VDOT), the distance, and the difference in altitude between where you train and the race’s 1 160 m — about 2% for every 300 m above 500 m. It does not model the hills, heat or your pacing, so allow for the course.
A full 20-week block for the Saturday, 13 March 2027 (expected) race starts on Monday Monday, 19 October 2026. The Om Die Dam 50 km training plan page has the calendar and race-day targets.
Build my Om Die Dam 50 km plan — free to buildSee your whole block before you pay.
Common questions
How do I predict my Om Die Dam 50 km time?
Type a recent race and where you train. The calculator works out your fitness, applies it to the race distance and corrects for altitude.
Can I use Om Die Dam as a Comrades qualifier?
Many runners do. Check the Comrades qualifying rules for 2027 for which races and times count.
When is the Om Die Dam 50 km?
Saturday, 13 March 2027 (expected). Check the official entry page before booking anything.
When should I start training for the Om Die Dam 50 km?
A full 20-week block starts on Monday Monday, 19 October 2026. A plan built later counts back from race day.