Please add here any workshop you like.
2012:
January 9 - March 16, 2012 Joint Universities Accelerator School
September 04 - 14, 2012 Herbstschule für Hochenergiephysik
June 6 - 19, 2012 European School of High-Energy Physics
September 16 - 24, 2012 International School of Nuclear Physics
2010:
February 13-20, 2010: ITEP Winterschool;
July 19-30,2010: Cargese Summer School 2010: Physics at TeV Colliders - From Tevatron to LHC
August 1-7, 2010: Zuoz Summer School;
August 16-27, 2010: Fifth CERN-Fermilab Hadron Collider Physics Summer School
General HEP page to start with:
http://www.conference-service.com/conferences/high-energy-physics-and-accelerators.html
CERN page to start with:
http://cdsweb.cern.ch/events/events.py/