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Diamond Head State Monument

Diamond Head State Monument is one of Hawaii’s most recognizable landmarks, known for its historic hiking trail, stunning coastal views, and military history. It is a symbol of the Hawaiian Islands’ natural beauty and a must-visit for anyone traveling to Oahu.

About the Place

The monument encompasses over 475 acres, including the interior and outer slopes of the crater. It is a tuff cone, which is a type of volcanic cone formed by the accumulation of volcanic debris. Diamond Head is a defining feature of the geography of Waikiki and the Honolulu area.


Diamond Head is estimated to have formed about 300,000 years ago from a single, explosive eruption. The crater was named “Diamond Head” by 19th-century British sailors who thought they had discovered diamonds on the crater’s slopes, which turned out to be calcite crystals.

The area played a significant military role as a lookout post for the United States Army during the 20th century, with bunkers and observation stations built into the crater walls. It was declared a National Natural Landmark in 1968.


  • Diamond Head is known as “Lē‘ahi” in Hawaiian, which means “brow of the tuna” due to its shape.
  • The summit of Diamond Head offers a panoramic view of Honolulu, Waikiki Beach, and the Pacific Ocean.
  • It is one of Hawaii’s most popular hiking destinations, with hundreds of thousands of visitors each year.
  • The trail to the summit was built in 1908 as part of Oahu’s coastal defense system.


Diamond Head is located at the east end of Waikiki and can be accessed from Diamond Head Road. The crater’s proximity to Honolulu makes it easily accessible to tourists.

Things to Do

  • Hiking the Diamond Head Summit Trail for breathtaking views.
  • Exploring the historic military installations, including old bunkers and observation decks.
  • Participating in guided walks to learn about the geological and military history.
  • Bird watching and plant identification along the trail.

Tips for Visiting

  • Arrive early to beat the heat and crowds, as the park can get very busy.
  • Bring water, sunscreen, and a hat, as the trail can be hot and dry.
  • Wear comfortable shoes suitable for rocky and uneven terrain.
  • Be prepared for a moderate hike; the trail includes steep stairs and narrow tunnels.


Diamond Head State Monument offers a unique blend of natural beauty, geological interest, and historical significance. It is an iconic feature of Hawaii’s landscape and offers one of the most rewarding hiking experiences in the state, with views that are truly unparalleled. Whether you’re an avid hiker or just looking for a picturesque spot to appreciate Oahu’s beauty, Diamond Head is a destination that shouldn’t be missed.

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