By far the most convenient way to get to Cercedilla is by cercanías (suburban line C-8b) train from Chamartín. They run at least once an hour, and the journey time is an hour and 20 minutes. Once in town you can take an additional single-gauge train trip via Puerto de Navacerrada and spectacular pine forest scenery up to the 1,700m-high (5,576-ft.) Cotos -- a ski center in winter and mountain walker's base in summer. This runs every 2 hours, and the trip lasts 40 minutes. The last train back to Madrid leaves Cercedilla at 10:35pm.
The Larrea bus company (tel. 91-530-48-00) provides an hourly service (no. 684) from Moncloa bus station.
If you're driving, take the N-VI highway to Guadarrama town and then bear left on the M-995, which brings you to Cercedilla.
Tourist offices (tel. 91-852-57-40) are located at Av. Sierra de Guadarrama 30, and the Town Hall at Plaza Mayor 1 (tel. 91-852-57-40) also provides local information. A kilometer (2/3-mile) inland from the railway station, you'll find the Fuenfría Valley Information Center, which gives details of six differently graded walks in the area along routes where tree trunks are marked in different colors according to each individual route, so you don't lose your way. It's open year-round from 9am to 6pm, except for Christmas and New Year fiesta days: December 25 and 31 and January 1 and 6.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.