Melloblocco is an international bouldering competition, which is held annually in Val Masino and Val di Mello since 2004.

The 2011 edition, the eighth time the competition was hosted, had 2600 participants from 22 different countries.^[1] The competition usually takes place the first weekend in May and lasts three days. The bouldering problems are plotted in the three to four months before the meeting by Simone Pedeferri.^[2] The problems are of varying difficulty, but only the most difficult, usually eight men and the same for women, are counted for the prize. On the last day, rewards are given to athletes who are able to climb as many of the boulders as possible during the competition.

Year	Men	Women
2004[3]	Chris Sharma	Stefania De Grandi
2005[4]	-	-
2006[5]	Mauro Calibani Anthony Lamiche	Barbara Zangerl
2007[6]	Mauro Calibani	Stefania De Grandi Anita Manachino
2008[7]	Adam Ondra	Barbara Zangerl
2009[8]	Adam Ondra	Yulia Abramchuk Olga Bibik Alexandra Balakireva Anna Gallyamova Chloé Graftiaux Silvie Rajfovà
2010[9]	Adam Ondra	Chloé Graftiaux
2011[1]	Adam Ondra Gabriele Moroni	Barbara Zangerl
2012[10]	Michele Caminati Anthony Gullsten Alexey Rubtsov	Shauna Coxsey
2013[11]	Stefano Ghisolfi	Barbara Zangerl
2014[12]	Stefano Ghisolfi Gabriele Moroni Marcello Bombardi Anthony Gullsten Alexey Rubtsov Michael Piccolruaz Sachi Amma	Yulia Abramchuk Mélissa Le Nevé
2015[13]	Adam Ondra Anthony Gullsten Martin Stráník Stefano Ghisolfi	Janja Garnbret
2016[14]	Stefano Ghisolfi	Jenny Lavarda

• Official website