From Lisbon’s airport, take the metro and get off at Rossio station (green line) – cost of the one way ticket: 1,75 €.
You should then take the train at Rossio Station, and continue to Portela de Sintra station.
There, take the Mafrense bus to Ericeira and exit at the first stop of the village of Santa Susana.
Next to the stop where you will exit, there is a narrow tarred cross (on the side of the road) with a sign saying “Quinta do Rajo” or “Ashram Ram Dass Guru”.
Follow the path walking for 7 minutes, guided by the signs.