Pantano de San Juan is a reservoir near San Martin de Valdeiglesias in the Community of Madrid, and the listed naturist-use area is a small cove on its shoreline. Access is on foot from informal tracks and parking areas around the reservoir, with uneven natural ground near the water. Parking is informal in roadside and dirt areas near reservoir access points and can fill on warm summer weekends. Public transport access is limited, so a private vehicle is generally needed. The shoreline surface is sand, gravel and natural rock, and entry into the water is over a natural bottom. Water is generally calm, although depth varies and the area is unsupervised. There is no lifeguard service expected, so swimmers need to take personal care, especially away from the shore. The most suitable season is June to September, when weather is warm and dry. Morning and late afternoon are generally more comfortable during hot weather because sun exposure is high around midday and there is little natural shade. The shoreline is largely exposed, so sun protection, drinking water, footwear for rough ground and a shade cover are practical. There is no food or drink service at the cove, and there are no toilets or showers there. Visitors generally bring water and supplies and carry waste out. No admission fee is indicated and no gate or booking is indicated, with daytime use typical. Weekends in summer can be busy, while weekdays are generally quieter. Because the terrain includes slopes and uneven ground, the cove is not wheelchair accessible.