This year we will follow the GR10. It is a traverse of the Pyrenees, from Hendaye on the Atlantic to Banyuls-sur-Mer on the Mediterranean. Daily blogs will file here.
The official GR10 website has lots of useful information, including all the gpx track data. It can be found here:
We also bought the e-book version of Trekking the GR10 (Cicerone). It’s generally good, though some of the links for accommodation take you to Chinese websites. Some of the route descriptions are a bit garbled (especially if there is a variant on the day), and in one case the route described is now closed, and looked dangerous.