A lot of marathons also have a half option which starts at the course halfway point, around 1:45 or 2 hours after the marathon starts. This means that you're trying to run the fucking marathon and there's a bunch of hams who are just starting their 3 hour half marathon waddle when you're only halfway through your own race mixing on the same road.  There are always hams trying to walk marathons which you get to dodge at the start line, and then AGAIN you have to dodge MORE hams at 13 miles in when their half starts. It's also incredibly irritating when smallfats (almost always girls, almost always wearing headphones) give you these bullshit smug looks when they pass you at mile 14 or 15 for you (mile 1-2 for them).  Like, "ooh look at me, I'm faster than this male shitlord, HA HA this is going on my tumblr!!!"  And I'm like bitch I've already run your entire race and I have your entire race to go, I'll see you at the fucking finish line. It's pretty annoying.