The Salt Lake Marathon is an annual event with a variety of events including an early morning bike tour of the marathon route, a marathon, half marathon and a 5K walk/run.
The site Marathon Foto has a massive gallery of marathon related photos.
My new Nikon D90 has a video feature. I decidede to try it out by recording the first three minutes of the race and uploaded to YouTube. My copy has a substantially higher resolution. The video shows the racing crowd split by the Trax Train.