We are four Norwegians who went from Pamplona to Castrojeriz in September. We had two detours, one of them was Eunate. I too recommend it, it was a wonderful church and the place had a special atmosphere. We didn't stay in the albergue though, but it looked nice.
The other detour was to Covarrubias and Silos. Covarrubias is of special interest to us Norwegians, because a Norwegian princess, Kristina, is buried there. She was married to the Spanish prince, Felipe. This was in the 13th century. Covarrubias is now a twin city with the Norvegian town Tønsberg where princess Kristina was born. But the little town is also of general interest, because it is a very well preserved old town.
We had booked a hotel room in Silos, but in Burgos we found out that to combine these two places was difficult because of the transport. Not many buses in the countryside! But through the tourist office in Burgos we found a small travel agency which arranges day trips and half day trips. So we took a half day trip with Carmen, and she was a splendid guide! The only problem was that she spoke only Spanish and we only English.. But strangely enough, we understood most of what she said! In Covarrubias we got to see the church and its museum with Kristina's sarcophagos, in Silos we saw part of the monastery and heard the monks sing. We were even taken to la Yecla, a spectacular canyon near Silos. On our way back to Burgos she showed us the parador in Lerma. We paid 40 Euros each, expensive perhaps, but it was worth it and I don't think we would have experienced all this on our own. This agency is called Viajes Burgos, c/Miranda 1, just opposite the bus station and Carmen is hereby recommended!
Tulle