is a former East German cross-country skier who competed from 1978 to 1980.
She won a gold medal in the 4 × 5 km relay at the 1980 Winter Olympics in Lake Placid, New York.
She competended for the SG Dynamo Klingenthal / Sportvereinigung (SV) Dynamo.
Rostock also won a silver medal in the 4 × 5 km relay at the 1978 FIS Nordic World Ski Championships in Lahti.