Koko Crater
Crater Prominent tuff cone with steep hiking railway trail
East of Honolulu, Koko Crater’s steep rail-track trail climbs a tuff cone to panoramic views; hikers and trail runners use the route, and the crater floor contains a botanical garden.
Koko Crater is a prominent tuff cone on the southeastern side of Oahu, formed by explosive volcanic activity and rising above the surrounding coastal plain. The crater and its rim are a well-known landmark in the Honolulu area and a frequent destination for hikers and sightseers.
A steep, popular trail climbs the crater along a former military tramway made of wooden ties and concrete steps, providing direct access to the summit ridge and panoramic coastal views. Within the crater floor is a dryland botanical garden that showcases arid-adapted plantings and is managed as part of Honolulu’s botanical gardens network.
The crater has been used for both military and civilian purposes over time, including the tramway built to service coastal defenses; today it is primarily a recreational and conservation area. Trails are exposed with little shade and can be hot and windy depending on conditions.
Koko Crater sits on Oahu’s southeastern coast near the suburb of Hawai’i Kai, about 7 miles (around 11 kilometers) southeast of downtown Honolulu. The crater overlooks Hanauma Bay and the residential and coastal areas of the island’s eastern shore.
- Trail conditions: The popular summit route follows the old tramway up the crater and is composed of railroad ties and concrete steps; the climb is steep and exposes hikers to sun and wind, so bring water and sun protection.
- Views: From the summit ridge there are clear views over Hanauma Bay, Hawai'i Kai, and the southeastern coastline of Oahu on a clear day.
What to See #
- Koko Head stairs (tramway): A stairway trail built on a former military tramway consisting of 1,048 steps that rises to the crater rim and summit, offering panoramic views of Oahu's southeastern shore and Hanauma Bay.
- Koko Crater Botanical Garden: A dryland botanical garden occupying the crater floor and maintained by Honolulu Botanical Gardens, focused on drought-tolerant and arid-adapted plants.
How to Get to Koko Crater #
From Honolulu, drive or take public transit toward Koko Head and follow signs to Koko Head District Park; parking is available at the trailhead but can fill on weekends. The trailhead is adjacent to Koko Head Park’s facilities and is easily reached from H-1 and local arterial roads.
Tips for Visiting Koko Crater #
- Hike the Koko Crater Railway Trail early in the morning to avoid heat; the climb is steep with exposed steps.
- Bring water and sun protection - there is almost no shade on the ascent.
- The trail features roughly 1,048 railway ties (steps); steep and strenuous in places, it's rewarding for views of Hanauma Bay and Oʻahu's southeastern coastline.
Best Time to Visit Koko Crater #
Best early morning year-round to avoid heat and catch soft light; winter offers slightly cooler conditions.
Weather & Climate near Koko Crater #
Subtropical climate with consistently warm temperatures year-round. Temperatures range from 18°C to 29°C. Moderate rainfall (967 mm/year).
January
January is mild with highs of 25°C and lows of 18°C. The wettest month with heavy rain (182 mm).
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February
February is mild with highs of 26°C and lows of 18°C. Moderate rainfall (75 mm).
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March
March is mild with highs of 26°C and lows of 18°C. Moderate rainfall (77 mm).
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April
April is mild with highs of 26°C and lows of 19°C. Moderate rainfall (64 mm).
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May
May is mild with highs of 27°C and lows of 20°C. Regular rainfall (88 mm).
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June
June is warm with highs of 28°C and lows of 21°C. The driest month with just 27 mm.
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July
July is warm with highs of 28°C and lows of 22°C. Moderate rainfall (49 mm).
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August
August is the warmest month with highs of 29°C and lows of 22°C. Moderate rainfall (39 mm).
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September
September is the warmest month with highs of 29°C and lows of 22°C. Moderate rainfall (57 mm).
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October
October is warm with highs of 28°C and lows of 21°C. Regular rainfall (95 mm).
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November
November is mild with highs of 27°C and lows of 20°C. Significant rainfall (124 mm).
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December
December is mild with highs of 26°C and lows of 19°C. Regular rainfall (90 mm).
