Açude Orós, officially named Açude Presidente Juscelino Kubistchek de Oliveira, is a large reservoir in the south-central interior of Ceará, Brazil, situated approximately 380–450 km from Fortaleza. It was formed by damming the Rio Jaguaribe and completed in January 1961. With a storage capacity of approximately 1.94 billion cubic metres, it ranks as the second largest reservoir in Ceará, behind only the Castanhão. The reservoir is broad and expansive, set against the characteristically arid landscape of the sertão, where the contrast between the dry, scrubby caatinga terrain and the wide open water is a defining visual feature.

The reservoir sits near the small municipality of Orós, which can be reached from Iguatu (roughly 25 km away) via well-maintained roads. The BR-116 from Fortaleza to Iguatu is paved and in good condition. Small boats can be rented locally for around R$100–200 per day, and there are multiple access ramps around the reservoir. The town of Orós is small and simple, so paddlers are advised to bring their own equipment rather than relying on local outfitters.

The reservoir supports active freshwater fishing, including tucunaré (introduced in the 1980s), tilápia, and native species such as curimatã. Fishing activity, including the use of traps (covos) for freshwater shrimp in the Rio Jaguaribe channel near the reservoir, is common and should be anticipated on the water. The reservoir serves multiple purposes including perennializing the Rio Jaguaribe, irrigation, aquaculture, agriculture, tourism, and hydroelectric use, meaning boat traffic and working vessels may be present.

Water levels vary significantly with rainfall patterns. In years of good rainfall, the reservoir fills and can overflow its spillway — an event of regional significance that draws visitors. During the dry season, water levels drop and fish concentrate, which increases fishing pressure on the water. Paddlers planning a visit should account for these seasonal fluctuations, as water levels can affect access points and the overall extent of navigable water. A historical museum in Orós documents the reservoir's construction and a significant dam failure event, providing cultural context for those interested in the site's history.