Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is San Jose (34% of total searches to Silicon Valley). The next most popular destinations are Burlingame (33%) and Palo Alto (20%). Searches for hotels in Mountain View (13%) are also popular.
KAYAK users have found double rooms in Silicon Valley for as cheap as £45 (Newark) in the last 3 days. The average price is £225.