Açude São Pedro Da Timbaúba is a reservoir located in the municipality of Miraíma, in the northern zone of Ceará, Brazil. The dam impounds the waters of the Rio Aracatiaçu and was completed in 1916, making it one of the older water infrastructure projects in the state. The reservoir has a maximum storage capacity of approximately 15.79 hm³ (roughly 15.79 million cubic meters), and the surface area covers approximately 1.2 square miles. The dam structure itself has a crest length of 600 meters, a crest width of 4 meters, and a maximum height of 12 meters, with a spillway crest elevation of 99 meters and a full supply level of 102 meters. The spillway is notably wide at 211 meters. One distinctive structural feature is that a railway bridge crosses directly over the spillway, making this reservoir unique among Ceará's water bodies.

The reservoir belongs to the Litoral hydrological system and sits within a drainage basin of 576 km². The town of Miraíma developed along the reservoir's margins, meaning the water body is closely integrated with the surrounding community. The landscape reflects the broader semi-arid character of the region, with vegetation patterns that shift noticeably between the dry season and the wet season. Rainfall in the region is seasonal, and the reservoir's volume fluctuates accordingly — it has reached 100% capacity and overflowed its spillway in both 2021 and 2024, typically during the early months of the year when rainfall is most concentrated. By contrast, levels can drop significantly during dry periods.

Pisciculture (fish farming) is an established activity on the reservoir and represents an important source of livelihood for the local population, which means paddlers should expect to encounter fish farming infrastructure on the water. No dedicated boat ramps or formal paddler access points exist for this reservoir. The water intake structure uses a siphon system with a 300mm diameter pipe and a length of approximately 49.57 meters. Given the semi-arid climate, temperatures in the area are consistently warm throughout the year, with daytime highs typically in the upper 80s to low 90s Fahrenheit.