The Big Mountain Music Festival is a two-day large music festival that takes place at Khao Yai in Nakhon Ratchasima (Korat) province.This mammoth event more than lives up to its name, having grown into one the biggest outdoor music festivals in not only Thailand, but all of Southeast Asia. There are plenty of reasons why Big Mountain Music Festival’s (BMMF) crowds have gone from 20,000 at its 2010 debut to 70,000 at its 2014 incarnation. One of the most obvious is GMM Grammy, the corporation that puts on the fest while also controlling 70-80 percent of the Thai music industry by making major contributions to terrestrial radio, digital TV, and film.