Police deployed thermal imaging equipment to find a Teesside woman who slipped 30ft (9m) down a snow-covered slope.
The 51-year-old was walking her two dogs in a densely-wooded area of Valley Gardens in Saltburn, near Redcar, when she slipped off a footpath on Tuesday.
The Cleveland Police helicopter was drafted in after the woman managed to raise the alarm on her mobile phone.
She was airlifted to hospital with suspected back injuries.
A force spokesman said temperatures in the area at the time were about -2C.
The Valley Gardens area of the seaside town is popular with dog walkers and is known for its steep, wooded paths.
Police urged dog walkers to be aware of the dangers of snow and ice in the area.