This is the marathon for speedruns that involve multiple people (co-op runs, races, etc). Killingpepsi and I will be running N++ for it in around an hour, but the entire schedule looks great. I've probably been more excited for this than any other marathon I've seen in a while. They're also raising money for Blue Path Service Dogs, which seems like a pretty cool group! All the information you need can be found on their twitch page, so come check them out!