It is the only reservoir in the Community of Madrid that allows motorized water sports.
The reservoir was created in 1955 to supply water to the metropolitan area and generate electricity.
The Virgen de la Nueva area holds a Blue Flag, an environmental certification awarded to beaches meeting strict quality standards.
The water level significantly fluctuates depending on seasonal rainfall and agricultural demand.
The reservoir serves as a major habitat for various bird species, including the grey heron and the common kingfisher.
Pantano de San Juan, known as the Madrid Beach, is the only reservoir in the Madrid region where motorized water sports and swimming are legally permitted. The reservoir spans 1,600 hectares, fed by the Alberche River, and features over 14 kilometers of shoreline. It serves as a vital water resource for the area while hosting recreational activities like kayaking, paddleboarding, and water skiing. The site includes designated zones for bathers, particularly around the Virgen de la Nueva beach, which holds a Blue Flag status. Its proximity to the Sierra de Gredos range contributes to a distinct microclimate, differing from the arid conditions in the city center. The reservoir is surrounded by a dense Mediterranean forest dominated by pine and holm oak trees.
The viewpoint overlooking the dam at the Virgen de la Nueva beach area.
Bring water shoes, as many entry points are rocky and uneven.
Pack a portable shade structure or umbrella, as natural shade is inconsistent near the water line.
Arrive early on weekends to secure parking, as spaces fill quickly during high summer.
Avoid entering the water near the dam structure or prohibited zones due to dangerous currents and underwater hazards.
Water sports activities are generally restricted to the summer season; swimming is unregulated but monitored by lifeguards during peak summer months.
Respect noise restrictions in designated camping zones and use authorized waste disposal bins to maintain the Blue Flag water quality.
