Segment Challenge now allows you to host your own virtual race.
You decide the race distance and type of activity – such as "Virtual 10K Run" – and how long competitors have to record their attempt. Competitors must go out and set their fastest time over that distance in a single activity. Overall position in the leaderboard is based on their fastest time over the race distance.
It's like a real race, except competitors can record their attempt at any time or location.