The Ruaka River is a scenic river located on the outskirts of Nairobi, Kenya, known for the "Ruaka Falls" (also called Paradise Lost) and its role in providing a green, tranquil escape near the city. The river flows through Karura Forest and eventually joins the Nairobi River. While it is a popular spot for picnics and hiking, it faces environmental challenges, including pollution and, in some areas,, restrictions on access due to nearby developments. 

Key Features and Highlights:

• Ruaka Falls: The river features a picturesque,, cascading waterfall surrounded by lush greenery.
• Recreation: The area is a popular,, nearby destination for hiking, picnics, and exploring caves.
• Location: The river flows near the town of Ruaka, a residential area in Kiambu County.
• Best Time to Visit: The falls are most spectacular during the rainy seasons (March–May and October–December).
• Environmental Status: While it flows through the green, protected areas of Karura Forest, sections of the river have faced issues with plastic waste, and there are on-going discussions about the preservation of its riparian land. 

The Ruaka River serves as a, crucial green space and a natural, recreational, area for residents and visitors to the Nairobi area.