A longish drive from San Sebastian, but a shorter drive to Barcelona, you could also consider Vall de Núria.

You can drive to Ribes de Freser from where you can take a rack railway which climbs to about 2000 metres where there is an hotel. As this is at altitude then you can easily access the higher parts of the range. We were last there in September some years ago and there was a ski lift operating that got you even higher (although no snow). A long drive, but of course going direct from San Sebastian to Barcelona is likely to take more than 6 hours.

Also in the area is the Alberg Núria Xanascat. I haven't been there so can't comment on how good it is but at over 2100 metres it's definitely in the mountains.

https://xanascat.gencat.cat/index.php/ca/albergs/albergs/nuria-xanascat

Thank you! It sounds like the Huesca area offers a lot of options. I’ll look into it further…

Thank you! This may be a little more involved than we can do, but I will look into it further!