Pacific Ocean
Oahu Island
USA Hawaii map Karte Oahu Island Koolau Range

Koolau Range is a mountain range in Honolulu County. The state capital Honolulu is located on the southeast coast of the island Oahu. 

The island is formed by two old eroded shield volcanoes, the Koolau and Waianae. The highest point of Oahu island is Mount Kaala (1’220 m) in the Waianae Range. The last eruption of Waianae is more than 2.5 million years ago.

Konahuanui (946 m) is the highest point of the Koolau. Koolau is about 37 miles long and makes up two thirds of the island of Oahu. Koolau mountain forms Oahu's windward coast and rises behind the leeward coast city of Honolulu. The volcano became dormant about 1.7 million years ago, but became active again hundreds of thousands of years later. 

There have been around 30 eruptions in the last 500,000 years, creating some of Oahu's famous landmarks, such as Koko Head, Hanauma Bay, Punchbowl Crater and Diamond Head. Geologists believe there is a remote possibility that Koolau will erupt again. 


Republic of Hawaii 1894.
The stamps are depicting the Port of Honolulu. 


www.mountainstamp.com Diamond Head Koolau volcano stamp

USA 1952, Diamond Head.

Diamond Head is a volcanic crater and part of the Koolau-Range. It is much younger than the main mass of the Koolau Mountain Range. Diamond Head is estimated to be about 150,000 years old and extinct for 150,000 years. (diameter 1150 m, elevation 232 m).


Dominica 1991, "Pearl Harbor WWII".
(USS Nevada beached and burning)
Pearl Harbor is a lagoon harbor on the island of Oahu, just in te west of Honolulu. 


www.mountainstamp.com  Diamond Head Koolau volcano stamp

USA 2002, Honolulu and the Diamond Head, also known Leahi in the background.
The stamps were issued in the series "Greetings".


www.mountainstamp.com Diamond Head stamp

USA 2002, Diamond Head in the background
Portrait of Duke Kahanamoku (1890-1068) in the foreground.


Grenada Grenadines 2002, Koolau Range.
The picture is taken over Kaaawa.
The souvenirsheet was issued in honour of the "The International Year of Mountains".


USA 2002, The "Hawaiian Missionary" stamps of 1851-1853.
The illustration of the miniaturesheet is showing Diamond Head.


Pacific Ocean