The Colorado Rockies home opener has become an unofficial holiday in Colorado, but sadly, you have to have a ticket to be a part of it.
This year's celebration is Friday, and the game is sold out as far as single game tickets go. You can still buy season tickets, and you'll get the opener, but otherwise you are stuck dealing with scalpers.
Still though, the prices aren't horrible if you really want to go. There are quite a few "cheap seats" left on StubHub for $110. $150 will get you some pretty decent seats.
...Or you could just play hooky and watch it on TV for free!