Seasonal and holiday Go Train service to Niagara Falls resumes May 21st.
Three Lakeshore West Line trips to Niagara Falls will depart Union Station at 8:51 a.m., 12:51 p.m. and 4:51 p.m. on weekends and holidays. Trips to Toronto will depart at 11:15 a.m., 3:15 p.m. and 7:15 p.m. from Niagara Falls.
A full list of the seasonal changes can be found on the Metrolinx website.