On the lake in '48... awesome color photos of early El Mirage racers
These photos are all from http://www.scta-bni.org/EM_1948_photos.htm where about half of them have captions I'm not interested in, since I won't know the people, and I heard about that page from Dan at http://blog.hemmings.com/index.php/2010/02/06/four-links-bonus-edition-vans-trucks-roadsters-retromobile/
For 1947 color photos of lakes bed racing http://justacarguy.blogspot.com/2010/02/chris-at-speed-seekers-foudn-more-1947.html