The landmark journey, composed of carriages which formed part of the original inaugural train, carried members of Talyllyn Railway Preservation Society and guests through Tywyn Wharf and Abergynolwyn stations. It included a special stop at Pendre station, one of the original stops at the time.
Society chairman Ian Drummond said: “The 150th anniversary events have been a great success for the railway, and in many cases have broken new ground in terms of what we can achieve.”