After getting the proper timing, altitude, and azimuth I was finally able to capture an iridium flare on my fourth attempt.
Date: January 31, 2009
Location: Death Valley National Park, CA
Optics: Canon EF 17-40mm f/4L USM used at 40mm
Camera: Canon 20Da on Tripod
Exposures: One single RAW light frame of 30 seconds at ISO 1600
Process: Cropped in Photoshop