Summer Schools are held yearly in many countries in Europe and also in the USA at several places and times - for instance by James Kerwin 1P at Holy Oak Camp. They last from 5 days like in Leksand (Sweden) and Zomergo in Holland up to two weeks, like the French Stage de Go or the Polish Letnia Szkola Go, both in July. There were Summer Schools in Hungary (several years in Bodajk, as in 1992), usually immediately after the EGC and in Czechia and Slovakia. Li Yue has organized a Summer Camp near Barcelona in 2009, with her brother Li 3P.
There are also the seasonal school is Winter, such as the Wintergo teaching events. One of the longer traditions is Ski-Go? in the Italian Alps. Teachers there included former insei Farid Benmalek, former Revue Française de Go editor Jeff Séailles, German Champion Christoph Gerlach and Hwang In-seong in the 2009 edition. In Holland, Wintergo has been held at almost the same time since 2007 - from the day after Christmas till New Year's Day (or January 2, like Ski-Go in 2009).