Nabao Lake (Filipino: Lawa ng Nabao) is a 38-hectare (94-acre) ecotourism site situated in Kalikasan Village, Barangay Santa Rita, adjacent to Barangay San Carlos in the Municipality of Cabiao, Nueva Ecija, Philippines along Jose Abad Santos Avenue.

The PHP105-million project of Mayor Ramil B. Rivera features, among others, a view deck, gazebo and a “batalan sa lawa.

It is home to fauna like the Bighead carp (Hypophthalmichthys nobilis) or "Imelda fish", the Asian swamp eel, tilapia and mudfish.

The lake's 20-M Eco-Tourism Park became the focus of the Paistimika Festival highlighting the town’s 167th foundation anniversary.

[1][2][3] The lake is categorized as hypereutrophic (TSI 60–100, having the highest amount of biological productivity, "poor" water quality) based upon low Secchi disk visibility reading.