Getting to Segovia

From Madrid - Barajas International Airport to Segovia:

By train:

Take the metro from Barajas Station to Chamartin Station (Railway station): take line 8 (Pink) from Barajas to Nuevos Ministerios, change to line 10 (Dark Blue) from Nuevos Ministerios to Chamartin Station

http://www.metromadrid.es/export/sites/metro/comun/documentos/planos/PlanoMetrocorteramalesp.pdf

Then take a train (departures: 8:00, 8:35, 11:15, 14:06, 14:20, 15:30, 16:10, 17:30, 17:35, 19:15, 20:00, 21:00)  to Segovia: http://www.renfe.es/

From Segovia train station there are direct buses to the city center
(walking distance to CEN2010 http://www.phantomsnet.net/cen2010/Location.php?p=13)

By coach:

Take the metro from Barajas Station to Principe Pio Coach Station: take line 8 (Pink) from Barajas to Nuevos Ministerios, change to line 6 (Grey) from Nuevos Ministerios to Principe Pio

http://www.metromadrid.es/export/sites/metro/comun/documentos/planos/PlanoMetrocorteramalesp.pdf

Then take the coach (departures every 30 minutes) from Principe Pio to Segovia city center 
(distance to CEN2010 http://www.phantomsnet.net/cen2010/Location.php?p=13)

La Sepulvedana Bus Station,
Paseo de la Florida, 11
http://www.lasepulvedana.es/SEG2/index.html