Google" - I'm telling you! This is the best search engine. No advertising crap and its very fast.
Sacramento Northern - This is THE BEST site for SNRR information. 4 Stars.
TrainYards.COM - The parent page of this site, NOT ran by me.
NORCAL SP Connection - A great page on the SP and its subsidaries
The Lakewood Branch - A really good page on street trackage (and more). Recommend.
SOUTHERN PACIFIC SANTA FE - Good site with lots of pics!
Central Pacific Railroad Photographic History Museum - Lots of unbelevieable old historical RR pics and info.