Originally Posted by globetrekker84
The only showers available in SFO are in the SQ SKL. However, that is in the International Terminal, which you won't be able to access. So the short answer is no. You won't be getting much either from SFO.
There are showers in the SFO Int'l F lounge (IFL) and UA Arrivals lounge, which is outside security. For for IFL, you need an outbound int'l F BP. For UA arrivals lounge, you need a paid or award C ticket or better - no upgraders to C allowed!