Do you want to come for a ride next May in sunny Spain?
I'm planning to follow the Ruta Via de la Plata (or the Camino Mozárabe as it's also known) the part from Sevilla to Salamanca. It's tracks and trails, mountain or CX bike, about 500k in seven days. Probably six or seven hours of riding per day for someone of my age - you might do it quicker :-)
Here are a couple of links:
Ruta de la Plata
(in Spanish but it's got a nice photo gallery - go to Fotografias).