There are several good introductory web sites available. These are just a few.
Each HEP laboratory also has a good introductory description of what they do. The major labs are listed here.
The experimental high energy physics group at the University of Oregon is actively involved in HEP experiments around the world. More details can be found on the Center for High Energy Physics webpage.
A good summary of the current opportunities for graduate students in experimental high energy physics can be found here.
The nature of particle physics research lends itself to a diverse selection of topics suitable for undergraduate research. These topics range from very hands-on hardware projects to very abstract numerical simulations. Please come talk to any of the High Energy Physics faculty to see if we can find a project to match your particular abilities, interests, and motivations.