Four people have died in separate road crashes across Queensland over the Easter long weekend.

A 51-year-old woman visiting from Victoria died after the Ford Focus hatchback she was travelling in collided head-on with a blue Ford Falcon ute on School Road at Logan Reserve about 9pm on Saturday.

Police allege the ute had been travelling at high speed, attempting to overtake three vehicles on the wrong side of the road with its lights off at the time.

The 51-year-old — a mother of four who had been returning from a party involving her daughter — died at the scene.

Queensland Police Acting Inspector Peter Venz said the 17-year-old female driver of the ute and several passengers were thrown from the vehicle.

They suffered non-life-threatening injuries, and the teenage driver, from Logan Reserve, was taken to hospital for testing to determine whether any substances were in her system.

The 28-year-old driver of the hatchback — the victim’s niece — and her two-year-old daughter were not injured.

Venz said a large-scale hoon event had been organised in the area at the time, and police were investigating whether the ute was linked to it.

He said the ute was not stolen but did not have number plates and was “possibly unregistered”.

Venz said the incident was preventable.

“Look, it’s all good fun until a tragic incident occurs,” Venz said.

“This is obviously a tragic situation that really could have been avoided by just following the road rules and being considerate of other road users.”

Just over two hours earlier, a motorcyclist died following a crash with a white Kia Cerato at Thornlands about 6.50pm.

Police said the 18-year-old Redland Bay man was riding a black Honda motorbike along Boundary Road when the Kia turned right from Affinity Way into his path.

He was taken to Princess Alexandra Hospital with life-threatening injuries, where he later died.

The driver of the Kia, a 24-year-old Acacia Ridge man, was not physically injured.

Investigations are underway to determine if speed was a contributing factor.

About 5pm the same day, a 31-year-old man died after losing control of a green Kawasaki quad bike and crashing into a pole on Pullom Road at East Palmerston.

He died at the scene.

Police are appealing to anyone with information, dashcam footage, or who saw the quad bike prior to the crash to come forward.

In a separate incident, an 83-year-old man died following a crash at Wishart.

He was a passenger in a car that struck a tree while attempting to turn right from Mount Gravatt Capalaba Road into Broadwater Road about 8.47am on Thursday.

The Wellington Point man was taken to Princess Alexandra Hospital, where he died on Saturday evening.

The 86-year-old female driver, also from Wellington Point, remains in hospital in a critical condition.

Investigations into all crashes are ongoing.

Venz urged drivers to take extra care on the roads.

“Look people, just please slow down,” he said.

“Don’t be in a hurry to get to where you have to go. Don’t drink or to consume drugs or medications before you drive.

“Wear your seatbelt, consider other road users, and just stay safe when you get behind the wheel of a car.”