Defence said the man was a Navy competitor in the Australian Defence Cycling Club 2013 Cycling Carnival.
It is understood the father, based at HMAS Albatross, lost control of his bike on a downhill track and crashed.

Defence said the incident happened about 2.25pm, and medical staff provided immediate first aid.

The man crashed during compulsory registration for an unrelated event, the weekend’s World Solo 24-hour Mountain Bike Championships, which will involve about 300 riders from at least 16 countries. The riders who were registering did not witness the accident, which took place a few hundred metres away.

"The member was seriously injured and was taken by ambulance to Canberra Hospital where he was pronounced dead," defence said.

"The member’s family has been notified and is receiving all appropriate support services. The Navy extends its sincerest condolences to the member’s family and his friends following this very sad and tragic accident."

NSW Police are preparing a report after a person was killed in a fiery crash near Tarago late Thursday night. Emergency services were called to Bungendore Road, at Tarago, just after midnight after a Ford Falcon sedan was seen on fire.

Initial inquiries indicate the car had crossed to the wrong side of the road and hit a tree before burning .
The body of one person was found inside the vehicle; it’s understood dental records will be sourced as part of the post-mortem examination next week, in an effort to formally identify the driver.