冒纳罗亚火山（夏威夷语：Mauna Loa）是夏威夷海岛上的一个活跃盾状火山，是形成夏威夷的五个火山当中的一个。它是世界最大孤立山体之一，海拔4，169米。虽然它峰顶比相邻的冒纳凯亚火山要低120英尺（37米），但夏威夷人仍然把它命名为「Mauna Loa」，意为「长山」。其穹丘长120千米，宽103千米，火山口莫库阿韦奥韦面积约10平方千米，深150-180米。估计它的容量大约为75,000立方千米（18,000立方英哩）。冬季顶部常为冰雪覆盖。从冒纳罗亚火山喷发出的熔岩流动性非常高，这导致该火山的坡度十分小。

Mauna Loa (/ˌmɔːnə ˈloʊ.ə/ or /ˌmaʊnə ˈloʊ.ə/; Hawaiian: [ˈmɐwnə ˈlowə]; English: Long Mountain) is one of five volcanoes that form the Island of Hawaii in the U.S. state of Hawaiʻi in the Pacific Ocean. The largest subaerial volcano in both mass and volume, Mauna Loa has historically been considered the largest volcano on Earth. It is an active shield volcano with relatively gentle slopes, with a volume estimated at approximately 18,000 cubic miles (75,000 km), although its peak is about 120 feet (37 m) lower than that of its neighbor, Mauna Kea. Lava eruptions from Mauna Loa are silica-poor and very fluid, and they tend to be non-explosive.