The Ultra Challenge, which took place on Saturday, started with a three kilometre swim through the Katherine Gorge, a 14km cross country run, a 40km road ride, an 18km mountain bike ride and a 10km 4WD road run.

Race Director Cameron Judson said the event allows competitors to challenge themselves and take in some beautiful scenery while they're doing it.

"The Katherine Ultra Challenge is the premier and adventure race in the Northern Territory," Mr Judson said.

"Highlighting the natural beauty of Nitmuluk National Park, the Katherine Gorge and its surrounds, it is a one day multisport event encompassing multiple legs to complete "the tonne" and cover 100kms through the best national park the Territory has to offer."

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"The Katherine Ultra Challenge is an event that encourages competitors of every ability and there are plenty of people who just want to have fun and go at their own pace."

The winning team, IPS, finished the race with an impressive time of five hours and four minutes.

The first man to complete the race, Jason Hamilton, did so in five hours and 23 minutes and the first woman, Kia King, finished the race in five hours and 36 minutes.

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