Ruaotuwhenua, Mountain summit in Auckland Region, New Zealand.

Ruaotuwhenua is a 440 meter summit in the Waitakere Ranges, topped with an air traffic radome and supporting infrastructure down its slope. The peak offers views across the ranges and toward Auckland, with native forest covering much of the surrounding terrain.

Ruaotuwhenua is a remnant of the eastern flank of the Waitakere Volcano, a Miocene volcanic crater complex that was uplifted from the seafloor between 3 and 5 million years ago. Until the early 1940s it was considered the highest point of the Waitakere Ranges, until waterworks engineer AD Mead measured Te Toiokawharu. In the late 1960s a radome and VHF transmission station were built on the summit for Auckland Airport radio monitoring.

The name Rua ō Te Whenua means "the rumble of the earth", likely referring to the roaring surf heard along the Nihotupu Valley. The hill also features in the Te Kawerau ā Maki story of Panuku and Parekura: the tūrehu Nihotupu lived in a cave here and kidnapped Parekura, and Panuku travelled to the cave to rescue her. Many place names in the eastern Waitākere Ranges refer to this legend.

Access is via Scenic Drive near Waiatarua settlement, which connects to walking tracks leading to the summit. Weather at this elevation changes quickly, so dress in layers and allow time for the hike to account for steep sections and exposed areas.

Until the early 1940s Ruaotuwhenua was considered the highest point of the Waitākere Ranges, until waterworks engineer AD Mead measured Te Toiokawharu and corrected the record. The hill's northern slope is the source of Stoney Creek, a tributary of the Opanuku Stream, while its south-eastern side feeds Mander Creek into the Upper Nihotupu Reservoir.