Every year since 1912, the pilgrimage of the Virgen de las Nieves in Trevélez takes places. The locals climb to the top of the Mulhacen, where a Mass is held at midday on 5th August.
Since the creation of the Parque Nacional de Sierra Nevada, the pilgrims walk up the mountain and the statue of the Virgin is taken on horseback. However, the Hoya del Portillo remains open for a few hours for cars to pass through up to Chorrillo, from where pilgrims must continue on foot.
In the afternoon of 4th August, many villagers take part in the pilgrimage and spend the night in Siete Lagunas. The next day, the procession begins at dawn, to see the sunrise from the top of the mountain.
On 5th August pilgrims who celebrate the day of the Virgen de las Nieves climb up the Mulhacen (3482 meters above sea level). Legend has it that the Moorish king Muley Hassen is buried here, and it is from him that the mountain gets its name. The villagers accompanied by with hundreds of mountaineers and trekkers from other surrounding villages and even from Granada meet here.
This tradition came about because of the miracle of the Virgin Mary that took place in 1717. It is said that councillor of Válor prayed for the town to be protected from the raging storm. Apparently the clouds suddenly dissolved making way for a sea of light in which he saw the Holy Virgin with her arms extended. Since then, over the centuries, many miracles have occurred here, and it is widely believed that the Virgin offers special protection to all people who live in the Sierra Nevada.