What's the shortest dwemer ruin the leads to blackreach? I've already been through Mzinchefelt for my first playthrough, and I might as well mix it up.

Alftand and Raldbthar are the other two entrances. Both are about the same length so just pick whichever you want.

nothing special there besides crimson nirnroot, giants, falmer, dwarven robots and a named dragon you can summon by using unrelenting force on that big thing in the center of the city. why do you even want to go to that **** hole?

What a worthless post. Nobody asked if you like Blackreach or not, way to not read the question.