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Routes
Bike touring routes & trails
United States
Honolulu County
Ko Olina

Mermaid Cave via Ko Olina

Easy

4.8

(4797)

6,682

riders

Mermaid Cave via Ko Olina

00:35

9.98km

60m

Cycling

Embark on an easy touring bicycle ride towards the scenic Ko Olina coast, a journey that covers 6.2 miles (10.0 km). You will experience mostly paved surfaces, making for a smooth and enjoyable outing. The route involves a gentle elevation gain of 182 feet (56 metres), which you can comfortably…

Last updated: April 23, 2026

Waypoints

A

Start point

Parking

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1

5.57 km

Mermaid Cave

Highlight • Cave

Mermaid Cave, or tunnels as it's often called, is a popular tourist destination. To get here, you walk over lava rock and go through an open hole. This cave is …

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9.98 km

End point

Parking

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Way Types & Surfaces

Way Types

6.30 km

1.65 km

1.05 km

915 m

< 100 m

Surfaces

8.83 km

922 m

214 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

Powered by Foreca

Today

Sunday 12 July

31°C

24°C

29 %

Additional weather tips

Max wind speed: 27.0 km/h

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Frequently Asked Questions

How long does it take to cycle Mermaid Cave via Ko Olina?

The cycling route is approximately 9.98 kilometers long and typically takes about 35 minutes to complete on a touring bicycle.

Is the cycling route suitable for beginners?

Yes, this is an easy bike ride, primarily on paved surfaces, making it suitable for all skill levels and beginners. The elevation gain is gentle.

What is the terrain like for cycling?

The cycling trail is characterized by mostly paved surfaces, offering a smooth and relatively flat path ideal for touring cyclists.

What can I expect to see along the cycling route?

While cycling, you'll experience the rugged coastal beauty of the Ko Olina area. The route leads you to the vicinity of the famous Mermaid Cave, which is a significant natural spectacle.

What is the best time of year to cycle this route?

O‘ahu generally offers pleasant cycling weather year-round. However, visiting during the drier months from April to October might provide the most comfortable conditions. Always check the local forecast before you go.

Does the cycling route intersect other paths?

Yes, the route also passes through sections of the Aala Walk.

Is the Mermaid Cave via Ko Olina cycling route dog-friendly?

Information specifically regarding dogs on this cycling route is not detailed. It's best to check local regulations for bike paths in the Ko Olina area regarding pets before bringing your dog.

Do I need a permit or pay an entrance fee for this cycling route?

There are no specific permits or entrance fees required for cycling this route itself. However, access to certain areas or facilities within Ko Olina might have their own rules.

Where can I park to access the cycling route?

While specific parking for the cycling route isn't detailed, visitors typically find parking in the Ko Olina area. It's advisable to look for public parking options near the resort or designated beach access points that allow for cycling route access.

Are there bike rentals available near Ko Olina?

Yes, there are bike rental services available in and around the Ko Olina area, making it convenient to access this cycling route even if you don't bring your own bike.

What should I know about accessing the Mermaid Caves themselves?

While the cycling portion is easy, accessing and exploring the actual Mermaid Cave requires dismounting and a challenging on-foot excursion over jagged, slippery rocks. It often involves descending into the cave through an opening. It's best to visit at low tide, and extreme caution is advised due to potential dangers like strong currents and the physical ability needed to enter and exit.

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