Racing on twitch with Beyond Chaos

My next two weeks are a little inconsistent as far as evenings go, but starting June 6 I can do more or less any afternoon-evening. Weekends are also variables.

This next week I could do... Thursday night and not the weekend. The following week, Tuesday or Thursday and weekend is available. After that, I'm much more open (I'm a teacher). My time zone is CST, if that helps. I'm also going to be terrible.   

When we are talking caves, I've seen what ancientcave and speedcave are, but is "racecave" a third password you can enter or is it just what we call a specific race? Sorry for the newb questions.