Represa João Penido is a reservoir located in the northern part of Juiz de Fora, in the state of Minas Gerais, southeastern Brazil. It sits roughly 20 minutes by road from the city center, making it a practical destination for day trips. The reservoir covers approximately 1.2 square miles and was formed by damming the Burros stream, with the Grama stream and the Vista Alegre stream serving as additional tributaries. Construction was completed in 1934, and the reservoir was built with the primary purpose of supplying drinking water to Juiz de Fora — a function it continues to serve today, providing roughly 50% of the city's water supply. The reservoir is named in honor of João Penido Filho, a physician who served as mayor of Juiz de Fora and played a significant role in the city's urban development.

The water body is expansive and calm, with conditions that support boating and jet skiing. A neighborhood known as Bairro Náutico provides direct water access and is used for launching boats. Some surrounding properties include private ramps. The reservoir has hosted organized sailing competition, including the Minas Gerais Sailing Championship, where Fleet 525 races on a long and narrow course. Wind conditions are highly variable, which adds complexity to navigation on the water.

The region experiences two well-defined seasons: a rainy season from October to April, characterized by higher temperatures and greater rainfall, and a dry season from May to September, with less precipitation and cooler conditions. These seasonal patterns are relevant for planning paddling trips, as water levels and weather stability will differ considerably between the two periods.

Along the shoreline, ruins of an older structure are visible in at least one location, partially overtaken by vegetation, including a tiled staircase that divides into two flights. The surrounding area includes rural estates and granjas. The reservoir is managed by CESAMA, the municipal water and sanitation authority, and its address is listed on Av. Eudóxio Infante Vieira in the Jardim Lermitage neighborhood of Juiz de Fora. Paddlers should be aware that, as a public water supply reservoir, applicable regulations regarding access and use should be confirmed with CESAMA before visiting.