My tip“In the autumn season, entering by car needs a prior booking; the Senda de la Tejera Negra loop is easy (6 km).”
One of the southernmost beech forests in Europe, on the slopes of the Sierra de Ayllón north of Guadalajara, which turn golden and red in late October and early November, beside the “Black Villages” built of slate stone.
Moderate effort, needs a car
By car from Cantalojas: 2 km paved, then a dirt track to a car park that needs a prior booking. The 6 km circular Carretas trail (2–2.5 hours) has a moderate climb. No services and almost no mobile coverage.
Address
Cantalojas, Guadalajara