A motorist lost control of his car just minutes before four cyclists were killed in a collision in the same spot, an inquest has heard.
The four riders were members of the Rhyl Cycling Club
Thomas Harland, 14, Maurice Broadbent, 61, Dave Horrocks, 55, and Wayne Wilkes, 42, were killed when a car skidded on ice near Abergele, Conwy.
One witness told the Abergele inquest she had never seen so much frost on the roads before the tragedy.
The inquest is continuing, and is expected to last about a month.
The four cyclists, who were members of the Rhyl Cycling Club, died on the A547 not far from the start of a 60 mile (97km) Sunday club ride to Llandudno's Great Orme on 8 January, 2006.
On the third day of the inquest, the jury heard that the fatal collision was the third incident that morning.
Several witnesses said it was the coldest day for a long time, and recalled frozen puddles along the roadside.
Drivers have recalled the icy conditions on the A547
Emily Rowlands, from Abergele, told the inquest she was driving to church when she noticed how icy the conditions were.
She added: "I don't recall the roads ever being as frosty as that."
North-east Wales coroner John Hughes has already told the jury the route was not gritted by Conwy Council that day, despite frost having been forecast.
After the collision with the cyclists, motorist Robert Harris, 47, from Abergele, was fined £180 with £35 costs last August and given six points on his licence after admitting having defective tyres.
The court heard that the defective tyres were not a factor in the accident.