To qualify as a finisher, you are required to submit your activity data on our website in the form of a public GPS activity link (as per your race distance) from apps like Strava, Garmin Connect, Runkeeper, Endomondo, etc, or public link to your finish timing at any organized marathon race.
It is not necessary for you to take part in an organized race to submit your run data. A self-supported run which meets the above data submission criteria is enough.