Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Palo Alto (43% of total searches to Silicon Valley). The next most popular destinations are Burlingame (23%) and Redwood City (17%). Searches for hotels in Milpitas (17%) are also popular.
KAYAK users have found double rooms in Silicon Valley for as cheap as €51 (San Jose) in the last 3 days. The average price is €170.