With the spookiest of holidays falling on a Monday this year, Silicon Valley Halloween events are ramping up for the weekend prior with a variety of daytime and late-night parties. We’ve collected more than 20 events, from annual standards like Great America’s Halloween Haunt and Flashlight Tours at Winchester Mystery House to freaky events at Silicon Valley’s top nightclubs.

Plan your festivities with our list of favorites below, and check back for more updates as the holiday approaches.

Find more events on with the SanJose.com calendar.