The village church was built in 1505. The church became a parish church in 1513. In 1528, the city of Bern accepted the new faith of the Protestant Reformation. Lenk, along with much of the Oberland, initially resisted the new faith but was forced to accept it in the same year. In the following year, Lenk had to protect itself against the Catholic Valais. The conflicts over religion closed the Rawil Pass into Valais for a time. However, the Pass remained an important trade route until the construction of the Lötschberg railway line in 1913. In 1878 much of the village was destroyed in a fire. The parish church rebuilt three years later in 1881.