It's suddenly alicorn story, I believe, but Just about all I remember about it is that Twilight wins running of the levaes sometime before her Ascension...

https://www.fimfiction.net/story/39849/rites-of-ascension ?

I remember it started with her inventing a 'running very fast' spell anyway. Don't remember if the running of the leaves was around.

6017756
Thanks, but no. Something else... And no running of the leaves there

I am now imagining a non-canon ascent fic where Twilight becomes an alicorn solely due to her winning the running of the leaves.

6017856
That might be pretty good.

Someone get on that.

On Wings Of Change Chapter 2 is what you're thinking of.

6018248
Yeah, that's it! Thanks a lot!