Mount Karioi

{{Infobox mountain | name = Mount Karioi | photo = Mt. Karioi, Raglan and Whaingaroa Harbour.jpg | photo_caption = Mt. Karioi, Raglan and Whaingaroa Harbour (February 2012) | map = New Zealand | map_caption = | location = North Island, New Zealand | label_position = right | map_image ={{maplink|frame=yes |frame-align=center |text=Map of selected volcanic features near Karioi (green marker). Clicking on the map enlarges it, and enables mouseover of volcano feature/wikilink and ages if available in brackets. The type of basaltic volcanic eruption (some are composite over their eruptive history) is indicated by red being arc basalts, pink being ring basalts of stratovolcanoes and brown being intra-arc basalts typical of those produced by monogenetic volcanic fields. Approximate location of characterised vents are black rectangles with red centres. For wider context see map at North Island Surface Volcanism. |raw=[,{ "type": "Feature", "properties": { "marker-size": "small", "marker-color": "#3e6e3e", "marker-symbol": "volcano", "title": "Karioi" }, "geometry": {"type": "Point", "coordinates":[174.816667, -37.866667]} }] |frame-width=270 |frame-height=250 |frame-lat=-37.9 |frame-long=174.9 |icon=no |zoom=10 }} | elevation_m = 756 | elevation_ref = | prominence = | listing = | translation = to loiter or idle | language = Māori | range = | coordinates = | topo = BD32 Raglan | type = Stratovolcano (extinct) | age = Pliocene | first_ascent = | easiest_route = from Ruapuke Rd | photo_size =300 }}

Karioi or Mount Karioi is a 2.4 million year old extinct stratovolcano SW of Raglan in the Waikato region of New Zealand's North Island. It was the earliest of the line of 6 calcalkalic volcanoes, the largest of which is Mount Pirongia (the others are at Kakepuku, Te Kawa, Tokanui, Waikeria and probably Puketotara). Karioi forms a background to many parts of Raglan.