Dularcha Railway Tunnel is a heritage-listed former railway tunnel at 1.5 kilometres (0.93 mi) south of Mooloolah township in Landsborough, Sunshine Coast Region, Queensland, Australia. It was built from 1890 to 1891 by T Jesser & Company. It is also known as North Coast Line No 1 : Mooloolah tunnel. It was added to the Queensland Heritage Register on 24 September 1999.