The festival of Thach Khoan communal temple is the festival of Muong People in the mountainous district, Thanh Son, Phu Tho. Compared with communal temples in Thanh Son district, Phu Tho Province, Thach Khoan communal temple is the most beautiful temple, keep relatively intact  ancient architecture. 

It is built on a small hill next to the wide field and towards the front of Tan Ba Vi Mountain. According to the elderly and some materials such as ordination, oration, ancient history, Thach Khoan communal temple was built long ago.

This communal temple worship the god Tan Vien Son under Hung Kinh dynasty, three princesses of Hung Kinh and 4 head of the tribe of Dinh family, Muong people who have the credits to help Le king for fighting against Minh enemy in the 15th century. The temple festival is held on 24 and 25 in January.

Before the festival day, the organization board selects 22 kind-hearted old people, virtuous and gentle people, united family to arrange to the mandarins to sacrifice. The writing of the funeral oration is an important work. The content of the funeral oration requesting for prosperous country and peaceful people, timely rains and favorable weather, abundant crops, happiness for people. After the sacrifice, they burned the funeral oration and the next year, rewrite it. During the festival, many folk games full of national characters are taken place.

In which, the game of throwing a ball through circle attracts most of people to participate in, which is a chance to open the exchanges, making friends and showing love. Becoming a good tradition, many people working far from home annually return to attend the temple festival. People belonging to other ethnic groups in the district, province also visit to exchange the culture, tighten the solidarity among ethnic groups living in Phu Tho Province.