The Quinta can be easily accesssed by road, (though the last 4kms can be challenging if you arrive after dark), and there are regular trains from Lisbon or Faro, both of which are serviced by scheduled or charter flights from most major airports.
The GPS co-ordinates for the start of our track are 37º33’04.5N / 8º25’03.0W
Full driving directions can be found on the Quinta website.