I’m currently running several extracurriculars related to a certain field and have been participating in them in grade 9. However, I have recently had the ability to take on an advisory role on the national board for an organization relating to the extracurriculars I’m doing.
Now I know that colleges look down upon people who start new extracurriculars in their senior year. Would this count as something colleges would look down upon? Or would they see it as working up towards a goal (if I support it with the correct explanation on my Common App). (EDIT for clarification: I would take on the role during this summer)
Thank you 
Colleges dislike fluff. This does not qualify as fluff, considering that it’s a national leadership position.
It sounds awesome!
It sounds like a fantastic opportunity that I’d totally go for. It definitely ties in with your other extracurriculars, and that makes it less a worry.
Basically, I doubt colleges would look down on it.
Of course they won’t look down on it. The idea is to be involved in activities that are meaningful to you-in other words things you’d do if you didn’t tell anybody about them-and to take on increasing responsibility as you become older and more competent.
There are lots of reasons kids start ECs in senior year. Would you leave off this advisory role- or an internship, job, invitational math competition, etc- just because it wasn’t available until you became a senior?
It sounds like you have built the skills to be offered this leadership position – and it isn’t the type of thing that would be offered to a ninth grader. I think it sounds like a great and unusual addition to your ECs.