冒纳凯阿火山（夏威夷语：Mauna Kea，意为「白山」）是位于夏威夷群岛的一座火山，是形成夏威夷岛的五座火山之一，冬季这里山顶有积雪。从位于水下的山脚到顶峰高度为10,203米，山上有13个天文台。

位于一州立公园（面积202公顷）中心的休眠火山冒纳凯阿峰，海拔4,205米，冒纳凯阿意为“白色山峰”，因其顶部常年积雪而得名。圆形山顶跨度为48千米，有无数火山锥。冒纳凯阿峰流出的熔岩覆盖了其西北科哈拉山的南面山坡，而其自身的西面和南面山坡却被从附近冒纳罗亚活火山流出的熔岩所掩埋。在冰川时代，一座厚约75米的冰川覆盖山峰，在3970米的高度形成了怀奥湖。山坡高3780米处，有若干洞穴，古代夏威夷人曾从这些洞穴中采掘玄武岩用于制作扁斧和其他切割工具。波哈库洛阿（2440米）有滑雪和狩猎营地。

Mauna Kea (English pronunciation:/ˌmɔːnə ˈkeɪ.ə/ or /ˌmaʊnə ˈkeɪ.ə/, Hawaiian: [ˈmɐwnə ˈkɛjə]), also called Mauna a Wākea in Hawaiian culture, is a dormant volcano on the island of Hawaiʻi. Standing 4,205 m (13,796 ft) above sea level, its peak is the highest point in the state of Hawaii. Much of the mountain is under water; when measured from its oceanic base, Mauna Kea is over 10,000 m (33,000 ft) tall. Mauna Kea is about a million years old, and has thus passed the most active shield stage of life hundreds of thousands of years ago. In its current post-shield state, its lava is more viscous, resulting in a steeper profile. Late volcanism has also given it a much rougher appearance than its neighboring volcanoes; contributing factors include the construction of cinder cones, the decentralization of its rift zones, the glaciation on its peak, and the weathering effects of the prevailing trade winds. Mauna Kea last erupted 6,000 to 4,000 years ago and is now considered dormant.