The 13.1 mile distance is also an excellent one for dressing up for a themed race -- long enough to flaunt your attire, but short enough that you may not feel the need to tear off your Jedi costume because you've sweated through it. Runner's World publishes a list of US destination marathons that feature breathtaking views, Star Wars characters, pirates, and more. Try that with a full marathon, and you're simply a novelty character, a fun distraction among a crowd of serious runners.
It's a great look for social media
All of the above combine to create the perfect storm for social media: the veneer of a perfect life filled with health, travel to new cities, outdoor scenery captured mid-run, all capped off by brunch. Just look at all these people talking about their #halfmarathon! More than a million of them, in all their perfectly curated glory.