A few facts about Guadalix de la Sierra
- About 6,800 people live in Guadalix de la Sierra.
- It lies in the Madrid region.
- Madrid, the largest city in Spain, is about 41 km away.
- For a bigger city, Collado-Villalba is about 31 km away.
- Close by: Colmenar Viejo (15 km), Tres Cantos (21 km) and Algete (27 km).