After four fatal motorbike accidents in NSW over the weekend, police are urging motorcyclists to take extreme care.
Police say motorcyclists are becoming too prevalent in road-trauma statistics.
Three of the four accidents occurred during a charity ride to raise money for childhood cancer.
On Sunday, a 67-year-old man participating in the Snowy Ride in southern NSW died when he crashed into a tree near Eden.
On Saturday, 57-year-old motorcyclist, also doing the ride, was thrown from his bike and died on the way to hospital after he swerved to avoid two foxes in Cooma.
A woman, aged 37, was found with fatal injuries down an embankment west of Wyndham after disappearing from an earlier stage of the ride on Friday.
Meanwhile, in an accident not believed to be related to the Snowy Ride, a 19-year-old died from his injuries at the scene after being thrown against a signpost in the Royal National Park.
"We urge motorcyclists to take extreme care, as they are more vulnerable than other road users," NSW Traffic and Highway Patrol Operations Commander, Superintendent Stuart Smith said.
"Drive to conditions, take breaks and always wear a helmet."
The Motorcycle Council of NSW also urged riders on charity events to take care.
Spokesman Justin Dorward said many of the riders in charity events had decades of road experience.
He said it was terrible that these people had set out to raise money for charity, and had not returned home.
"On rides like these, riders are only going to these places once a year or less and they don't have that local knowledge," he told AAP."They need to be more aware of the conditions and make sure they can make it back to the event next year."