Welcome to Om Die Dam!

The Old Mutual Om die Dam Ultra Marathon is the largest inland ultra-marathon in South Africa, offering a 50km ultra marathon, a 21km half-marathon, a 10km route and a 5km fun run. Due to the races scenic route – via the Hartbeespoort Dam – and family appeal, it attracts over 10 000 participants every year and is consistently voted as one of the top national races with the ultra being the flagship event.

Gold medals will be awarded to category winners, silver medals to men finishing under 3:45 and women finishing under 4:10, and bronze to all other finishers.

Races timed by ChampionChip include the 50km, 21km and the10km,, all runners will therefore be required to run with a ChampionChip in order to participate in the event and receive an official race time. To ensure that your Race Results are accurately recorded  it is important that your ChampionChip is correctly registered in your name with the correct details. No chip. No result. No prize.

Learn more about the Old Mutual Om Die Dam Marathon.

The first Old Mutual Om Die Dam was run in 1991 and has grown into one of the finest ultra-marathons in South Africa, offering a great family day out with it’s diversity of four different race distances, it is a race for everyone. Only an hour’s drive from Johannesburg, or around 40 mins from Pretoria, a trip to the Hartebeespoort Dam is always a pleasure, and if that wasn’t enough the magnificently scenic routes will have you wanting to do a second lap when you reach the finish.

Runners doing the Ultra will head out on the R104, through the tunnel crossing over the dam wall, passing under the Arch de Triumph after which they will turn left at Damdoryn and onto the R512. They will then head up the first climb of the day, Commando Neck. After crossing the Westerly point of the dam runners will be treated to a beautiful view of the rising sun reflecting dramatically on the calm water below! Runners will turn left again, running past Pecanwood Golf Estate and come into Broederstroom, the R512 turns towards Lanseria but the race will continue straight onto the R104 past Pelindaba.

But Beware Saartjies!

After another left turn at the R511 intersection runners will be faced with Saartjies Neck, the 2km monster at 36km, but remember to take a breath, the view over the dam is well worth the climb. After Saartjies, runners will carry on past Jasmyn Farm Stall and through the residential suburbs of Meerhof, Ifafi and Melodie before reaching the finish at Schoemansville.

At Meerhof  be sure to look out for the children at Meerhof School, one of our official charities, who will be handing out traditional ‘melktert’ to the exhausted runners. The half marathon and shorter races run mainly around the suburbs of Hartbeespoort and are generally flat, easy and fast.

It can be hot in Harties at this time of the year, but the event is renowned for its superb refreshment stations, with 19 in total on the ultra route, spaced every 3km for the first half, and then every 2km from halfway. Besides water and Coke at all stations, some also offer potatoes, bananas, chocolates, jelly sweets and other ‘morale lifters’. The organisers know how to look after tired runners! That attention to detail is just part of what makes this race one of the benchmark races on the South African race calendar. See you there!


Schoemansville Oewer Club

Waterfront Street


GPS Coordinates: S 25° 73.394’ – E 27° 86.928’

All entrants have to collect their race packs before the day of the race. Collection venues will be confirmed.