There are several summer schools related to machine learning.
We are running a two week machine learning summer school in Chicago, USA May 16-27.
IPAM is running a more focused three week summer school on Intelligent Extraction of Information from Graphs and High Dimensional Data in Los Angeles, USA July 11-29.
A broad one-week school on analysis of patterns will be held in Erice, Italy, Oct. 28-Nov 6.