What's going on 3/6 - 3/9

I'm going to be in town for a conference 3/4 - 3/11 and I've noticed mid week that rates are jacked up all across town. I can't find a reason for it. The NCAA Tourney will not have kicked off yet and I can't find a giant event to cause crazy rates.

Anyone have any insight?

Nascar weekend is March 10-12, 2017.

The weird part is that the rates are jacked up before the 10th. Oh well sounds like the reason- Thanks!

Several conventions and basketball tournaments