Etna, California . Etna, California Etna is a city in the Scott Valley area of Siskiyou County, California, United States. The population was 737 at the 2010 census, down from 781 at the 2000 census. Originally named Rough and Ready, it was changed by statute in 1874 to Etna after the local flour mill (spelled Ætna/Aetna after Mount Ætna in Sicily). Etna is located at (41.457350, -122.896875). Etna is in Northern California near the Oregon border, located in Scott Valley near the CDP of Greenview, the city of Fort Jones, and the unincorporated community of Callahan. Etna is located at the foot
Mount Hobson (Great Barrier Island) and stairs to protect the breeding areas and prevent erosion. A number of rare and declining plants on the mainland are largely restricted (or completely restricted) to Great Barrier Island are found on Mount Hobson, these include, "Pittosporum kirkii", "Epacris sinclairii", "Kunzea sinclairii", and also "Olearia allomii". Mount Hobson (Great Barrier Island) Mount Hobson ("Hirakimata" in Maori) is the highest mountain on Great Barrier Island, New Zealand. Located in the centre of the island, it rises above sea level. Various mountain tracks allow relatively easy access to the summit, with the shortest (2 hour) track leading through the famous Windy