My time is based on the time offset from the start of the race. We typically have a photographer slightly before the finish line.
So, if you finished the race in exactly 30 minutes, you should look between 29 and 30 minutes because that's when you passed the photographers.
I have already sampled hundreds of distinct colors from the photos and provide this as an experimental method for finding pictures.
By pre-calculating the primary colors(RGB) and adding their location in the photo to a database, you are able to select one or more clothing colors that you wore at the event.
Then, the system quickly scans for photos colors with a proximity to the right place in the photo.
This especially helpful if you did not have a race number visible AND were wearing interesting clothes. Black and or white clothes are statistically irrelevant.