Cut from another thread:
The following is probably too detailed for what you want but thought I'd bung it up anyway in case others find it useful.
It's an online topo map from the IGN (Spanish version of OS). It goes into a great level of detail and I use it for off road routes in the Pyrenees. It's a bit clonky and you need to make sure you have the correct layers on/off but once used to it it's fine.
IGN LINKY
There is another online map which is similar but even better, produced by the Spanish Geographical guys or summit like that. If I can find a link I'll post it up
Andres
My computer has gone wappy and I can't open the links to compare, THIS LINK may be the same (it's also from IGN) but it's the map I was looking for earlier - like you say you can spend hours just mooning around zooming in and out of areas
Andres
I find the Zoom maps by Michelin make it a lot easier to find small interesting roads. This series https://dash4it.co.uk/145-pirineos-centrales.html
Also, as mentioned, the IGN and ICGC which are the official Spanish mapping agencies for (all of) Spain and specifically Catalunya respectively, have superb websites where you can download maps, plot routes and a ton of other stuff. Both these outfits maintain more than one site and it can be a bit confusing at first but it's well worth poking around to find what you want.
Here are a couple of starter links for you
http://www.ign.es/iberpix2/visor/
http://www.icc.cat/appdownloads/
http://www.instamaps.cat/index.html
I navigate using a phone these days and both outfits provide FOC downloadable maps for use offline. They work very well on my cheapo Nomu S10 Android phone.