Mountain rescue volunteers and helicopter paramedics were unable to save the life of a 61-year-old man who collapsed on the path descending the south side of Carl Side, on Skiddaw, on Sunday afternoon.
Walkers went to the aid of the man at the same time as alerting the emergency services.
The Great North air ambulance was first on the scene followed shortly afterwards by members of Keswick mountain rescue team.
But despite a sustained effort by all the medical professionals, the man could not be resuscitated.
Fourteen volunteers were involved in the three-hour operation.
