In reply to goatee:
The Sierra Nevada need to be treated with a lot of respect and caution. They may lack the grandeur of the Alps, but they are still big mountains. Rather like the Cairngorms except that they are about 3 times as high and large. Apart from the ski resort road there is no quick easy way up into them or off them. There is virtually no shelter on them and they are susceptible to sudden and severe winter storms. Sadly they have an historical record of tragic deaths from exposure/hypothermia, and these have included British parties caught out on them in the winter. They should be treated with respect, and parties venturing onto them in winter need to be as well prepared as parties going into the Cairngorms in winter, not only in terms of experience, winter clothing, food, survival shelters etc, but also navigational skills , and access to reliable weather forecasts.
https://www.theguardian.com/uk/2006/mar/07/spain.world
Post edited at 19:08