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.
