Mountain rescue teams said 2005 marked the highest number of deaths on record in the Lake District.
Lake District Search and Mountain Rescue Association (LDSAMRA) figures show teams attended 395 incidents in 2005 and there were 19 fatalities.
It comes as the association starts a major campaign to raise awareness of the work done by the 450 volunteers belonging to the 12 teams in the area.
It is also urging more hill users to learn basic life support skills.
Of the 19 deaths, 10 were people who had collapsed with medical problems, mainly heart-related.
The association said that in only two of the cases did companions attempt resuscitation, which it said served as a warning for people to learn life support skills.
There were two rock-climbing deaths and four people died after falling while hill walking.
A campaign is being run which will involve 50,000 posters being put up in outdoor shops, hotels and community centres across the Lake District.
Thousands of cards will also be handed out giving advice on what to do if a mountain rescue team is needed. The aim is that there will be fewer delays in sending out the correct resource and equipment.
It is in response to concerns that people have a limited understanding about mountain rescue and also concerns over the growing number of incidents they are called out to.
It is also to make people aware that the service is provided through voluntary donations.