Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is San Diego (32% of total searches to West Coast). The next most popular destinations are Los Angeles (30%) and San Francisco (20%). Searches for hotels in Seattle (18%) are also popular.
KAYAK users have found double rooms in West Coast for as cheap as $22 (Portland) in the last 3 days. The average price is $280.