According to BART's station finder (http://www.bart.gov/stations/station...irections.asp), the Holiday Inn SFO isn't that close to BART at all! Hopefully there's a shuttle.

The SFO BART station is actually inside the airport, adjacent to the International Terminal; the SFO hotels are all a couple miles off-site. Airport hotels that are actually close to a BART station would probably be near the Millbrae or South San Francisco stations, a stop away from the airport.