2. Roma Trastevere station to Viterbo Porta Fiorentina station by Trenitalia unreserved regionale train;
NOTE: Some trains from Rome terminate at Viterbo Porta Romana station and don't proceed to Porta Fiorentina station. The COTRAL bus stop to Bolsena is on Viale Trento near the Porta Fiorentina station, which is about 1.6 kilometers from Porta Romana station, along Viale Capocci (rather far to walk with luggage). Use a taxi or a local bus to reach Viale Trento.