I think that the Burgos to Leon section is a love or hate thing. We did it in August 2008. It is hot at that time of the year, so our strategy was to set off just before sunrise and get most of the walking done by early afternoon before it got really hot. We were also blessed with a slight breeze on the days that we had to walk longer (it is dead flat so you can walk for ages). I loved this section. The wide open vistas were amazing. The sky seemed to go on forever. I spent this section either have great conversations with amigos del camino or just totalling zoning out (like meditating while walking). I have a stressful job, so the ability to just think of nothing but the sun, the sky, the vistas and the breeze was great. On the other hand, I know many people who hated this section. They found it too hot and too boring. So, you need to think about what what would rock your boat. It took us 6 days to go from Burgos to Leon. Day 1: Burgos to Hontanas (30 km) (note: Hontanas is lovely); Day 2: Hontanas to Fromista (35km); Day 3: Fromista to Calzadilla de la Cueza (37km) (note: we probably should have stayed in Carrion de los Condes); Day 4: Calzadilla de la Cueza to Bercianos (32km); Day 5 Bercianos to Mansilla de las Mulas (27km); Day 6: Mansilla to Leon (18.5). We started off in France, so we were pretty fit by the time we hit this section of the Camino and by this time we had posted back anything that wasn't absolutely necessary, so our packs were light. I wouldn't recommend doing long days like these if you were starting off and your body isn't used to it. What I can highly recommend is the peregrino foot ointment which we bought in the Alberge in Fromista. This stuff is magic!