Over one thousand four hundred competitors aged between 14 to 87 have taken part in the 2014 City of Birmingham Triathlon.
This is only the third year the event has been held in Birmingham with athletes of all abilities setting off on a lap of the lake at Sutton Park.
Cows blamed for sparking an E.Coli outbreak at a park in the West Midlands will return to the popular site, after being given the all clear.
The cattle were removed from Sutton Park last July, when six children were taken to hospital after becoming infected with the bacteria.
Sutton Park is the largest city park in Europe.
Children can once again visit Sutton Park after parents were advised not to take them due to an E.coli outbreak.
Officials advised parents not to bring children under 10-years-old to the park last month until the infection had been cleared.
The Health Protection Agency has been working with Birmingham City Council to reduce the spread of the infection which has been linked to the faeces of animals living in the park.
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The Head of Parks at Birmingham City Council is hoping the recent outbreaks of e.coli at Sutton Parks won't keep people away from the area.
Seven patients including five children under the age of 8, have been infected with E. coli O157 in recent weeks. At least one is known to have been hospitalised.
Darren Share, Head fo Parks at Birmingham City Council, said: "Come along to the park but take precaution.
"We have signs up telling people what to do. Please wash your hands and make sure that children, especially those under eight, are kept away from grazing animals. Also look after your pets."
Dr Roger Gajraj from the Health Protection Agency was at Sutton Park in Sutton Coldfield today, where he was offering advice to parents and children to help stop anybody else being infected with E. coli.
He advised parents on how E. coli enters on infection prevention tips, such as washing your hands before eating and washing pram and bicycle tyres after visiting the park.
The Health Protection Agency (HPA) is working with Birmingham City Council to investigate an outbreak of e.coli at Sutton Park in Sutton Coldfield.
Of the seven patients identified as being infected with E. coli O157 in recent weeks, five were children under eight and at least one is known to have been hospitalised.
The HPA said the strain of the bacteria was often associated with contact with rural environments that may have been contaminated by animal faeces.