Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Soria (46% of total searches to Castile and León). The next most popular destinations are Segovia (23%) and Burgos (15%). Searches for hotels in Valladolid (15%) are also popular.
KAYAK users have found double rooms in Castile and León for as cheap as $22 (León) in the last 3 days. The average price is $210.