After four days of hearings last week, the inquest into the death of six-year-old Mylee Maxwell wrapped up in the NSW Coroner's Court in Sydney.

Myley Maxwell had been a "beautiful, healthy, happy little girl" and a "vibrant child" and had gone to a sleepover at a friend's house at Gwabegar when tragedy struck on March 5, 2017.

The inquest heard five children were playing at the farm on the morning and were "given permission" to ride on two red adult-sized quad bikes before the death.

Myley suffered non-survivable head trauma with multiple skull fractures and bleeding on the brain.

Some of the detail including where the accident occurred and who was at the scene cannot be reported for legal reasons.

READ ALSO:

Deputy state coroner Elizabeth Ryan is examining what caused or contributed to the crash; whether relevant quad bike riding regulations were complied with; whether the quad bike was fit to be ridden; and whether further regulations are needed governing riders and passengers on quad bikes.

She will hand down her findings in May in Sydney.