Discovering the Secrets of Hawaii’s Underground Lava Channels

Hawaii’s volcanic landscape holds secrets hidden beneath the surface: lava tubes. These underground channels, formed by flowing lava, offer a unique glimpse into the geological processes that have shaped the islands. Exploring them is an adventure unlike any other, but it requires careful planning and respect for the environment. This article delves into the specifics of discovering and exploring these fascinating formations safely and responsibly.

Understanding Lava Tube Formation

Lava tubes are essentially natural pipelines formed during volcanic eruptions. Imagine a river of lava flowing across the land. The surface cools and hardens, creating a crust. Beneath this insulating crust, the molten lava continues to flow. Over time, as the eruption subsides, the lava drains away, leaving behind an empty tunnel. The size of these tubes can vary dramatically, from narrow passages requiring crawling to vast caverns you can walk through. The formation process largely depends on the lava type and flow rate. Pahoehoe lava, known for its smooth, ropy texture, is more likely to create lava tubes than ‘a’a lava, which is rough and fragmented.

Where to Find Accessible Lava Tubes in Hawaii

Several locations across the Hawaiian Islands offer opportunities to explore lava tubes, each with its own character and accessibility. Let’s look at some prime spots:

Kazumura Cave, Big Island

Kazumura Cave, located in the Puna district, is one of the longest and deepest lava tubes in the world. While much of it is only accessible to experienced cavers with specialized equipment, portions can be explored with guided tours. Exploring Kazumura Caves isn’t cheap, but it is usually worth it. Cost vary depends on the tour itself with prices ranging from $50 up to a few hundreds. Contact local tour operators in advance for pricing and availability. To get to Kazumura Cave, head towards Volcanoes National Park; the access point will be specified by your chosen tour operator. Expect uneven terrain when exploring here.

Nahuku – Thurston Lava Tube, Hawaii Volcanoes National Park

Located within Hawaii Volcanoes National Park, Nahuku (also known as the Thurston Lava Tube) is one of the most easily accessible and popular lava tubes in Hawaii. It’s a well-lit, relatively short tube that’s perfect for beginners. The paved pathway makes it accessible to most visitors. This tube is free to enter with park admission, with Hawaii Volcanoes National Park entrance fees ranging from $30 per vehicle. Nahuku is very close to the Kilauea Visitor Center within the park, which means parking can get congested so try to arrive early. It has well-lit pathways inside the lava tube, however, outside the tube, in the surrounding rainforest, the ground may be slippery.

Kaumana Cave, Big Island

Kaumana Cave, near Hilo on the Big Island, is a bit more adventurous than Nahuku. It’s a wild cave – meaning it’s unlit and not developed with paved pathways. You’ll need a good flashlight, sturdy shoes, and a sense of adventure. The entrance is easy to find on Kaumana Drive (Highway 200), but be aware that the initial descent can be steep and slippery. There’s no entry cost here. Be prepared to navigate uneven terrain and potentially encounter some tight spaces. It is highly recommended to have a strong light source. Bring an extra one.

Manuka State Wayside Park Lava Tube, Big Island

Located within the Manuka State Wayside Park, this small lava tube is less famous compared to the others. This is a fine place to learn more about the island’s volcanic landscape. The entrance to the tube is near the parking area. This is also free site. Be prepared to meet some bugs and mud.

Essential Gear for Lava Tube Exploration

Regardless of the lava tube you choose to explore, having the right gear will make your experience safer and more enjoyable:

Headlamp or Flashlight:

This is non-negotiable. You need both hands free, so a headlamp is ideal. Make sure it’s bright and has fresh batteries, and carry a backup.
Sturdy Shoes: Forget sandals or flip-flops. Wear closed-toe shoes with good traction to protect your feet from sharp rocks and uneven surfaces. Hiking boots are a great option.
Long Pants and Sleeves: Even if it’s warm outside, lava tubes can be cool and damp. Long clothing will also protect you from scrapes and insect bites.
Gloves: Protect your hands from rough surfaces and potential cuts. Leather or gardening gloves work well.
Water and Snacks: Staying hydrated and energized is crucial, especially during longer explorations.
First-Aid Kit: A small kit with essentials like bandages, antiseptic wipes, and pain relievers is always a good idea.
Camera: Capture the unique beauty of these subterranean landscapes.
Backpack: To carry all your gear comfortably.

Safety Tips for Lava Tube Exploration

Exploring lava tubes can be incredibly rewarding, but it’s essential to prioritize safety. Here are some tips to keep in mind:

Never Explore Alone:

Always go with a buddy or a guided tour. This ensures that someone can assist you in case of an accident.
Inform Someone of Your Plans: Let someone know where you’re going and when you expect to be back.
Check the Weather Forecast: Avoid exploring lava tubes during or after heavy rains, as they can become flooded.
Be Aware of Your Surroundings: Watch your step, and be mindful of low ceilings and uneven surfaces.
Stay on Marked Trails: If you’re in a developed lava tube like Nahuku, stick to the designated pathways.
Avoid Touching the Walls: The surfaces of lava tubes can be fragile, and oils from your skin can damage them.
Be Respectful of the Environment: Leave no trace behind. Pack out everything you pack in, and avoid disturbing any natural formations or wildlife.
Watch out for Hazardous Gases: Though rare, some lava tubes can have pockets of hazardous gases. Contact the National Park Service or local geologists for up-to-date information on gas levels.
Slippery Conditions: Internal lava tubes are damp. Especially near the cave entrance are often slippery. Watch your step and wear shoes with a great grip.

Taking a Guided Tour vs. Exploring Independently

The decision of whether to take a guided tour or explore independently depends on your experience level, comfort zone, and the specific lava tube you’re interested in. Here’s a breakdown of the pros and cons of each:

Guided Tours

Pros:
Safety: Experienced guides are trained to navigate lava tubes safely and are knowledgeable about potential hazards.
Knowledge: Guides can provide fascinating insights into the geology, ecology, and history of the lava tubes.
Access: Some lava tubes, like those in Kazumura Cave, are only accessible with a guided tour.
Gear: Some tours provide necessary gear, such as headlamps and helmets.
Cons:
Cost: Guided tours can be expensive.
Schedule: You’re bound to the tour schedule and itinerary.
Crowds: Tours can sometimes be crowded, which can detract from the experience.

Independent Exploration

Pros:
Freedom: You can explore at your own pace and on your own schedule.
Cost-Effective: Independent exploration is generally cheaper than taking a guided tour.
Adventure: It can be more adventurous and rewarding to discover a lava tube on your own.
Cons:
Safety: You’re responsible for your own safety and must be aware of potential hazards.
Lack of Knowledge: You won’t have the benefit of a guide’s expertise.
Accessibility: Some lava tubes are difficult to find or access without local knowledge.

For beginners or those exploring more challenging lava tubes, a guided tour is highly recommended. For experienced adventurers who are comfortable navigating in the dark and understand the risks, independent exploration can be a rewarding experience.

Responsible Lava Tube Exploration: Leave No Trace

Lava tubes are delicate ecosystems that can be easily damaged by human activity. It’s crucial to practice responsible exploration to preserve these unique environments for future generations. Here are some principles of Leave No Trace to follow:

Plan Ahead and Prepare:

Research the lava tube you plan to explore, and bring all necessary gear and supplies.
Travel and Camp on Durable Surfaces: Stick to established trails and avoid stepping on fragile formations.
Dispose of Waste Properly: Pack out everything you pack in, including trash, food scraps, and human waste.
Leave What You Find: Do not remove any rocks, minerals, plants, or artifacts from the lava tube.
Minimize Campfire Impacts: Campfires are generally not allowed in or near lava tubes.
Respect Wildlife: Observe wildlife from a distance and avoid disturbing their habitat.
Be Considerate of Other Visitors: Keep noise levels down and respect the privacy of other explorers.

Photography Tips for Lava Tubes

Capturing the beauty of lava tubes requires some specific techniques. The darkness and unique textures present challenges, but with the right approach, you can create stunning images:

Use a Tripod:

A tripod is essential for steadying your camera in low light conditions.
Shoot in RAW Format: RAW format captures more data, giving you greater flexibility in post-processing.
Use a Wide-Angle Lens: A wide-angle lens will allow you to capture more of the scene in tight spaces.
Experiment with Long Exposures: Long exposures can create a sense of movement and drama.
Use a Flash or Headlamp for Fill Light: A flash or headlamp can be used to illuminate specific areas and add depth to your photos. You can use another person to “paint” the scene with light while you take the picture.
Focus Carefully: Ensure your subject is in sharp focus. Manual focus may be necessary in low light.
Adjust White Balance: Experiment with different white balance settings to achieve the desired color tone.

Respecting Cultural Significance

Many lava tubes in Hawaii hold cultural significance to Native Hawaiians. They may have been used as shelters, burial sites, or places of spiritual significance. It’s essential to be respectful of these sites and avoid disturbing anything that may be of cultural importance. Before you explore, doing some research about an area’s history may be beneficial. If you come across anything that looks like a cultural artifact, leave it undisturbed and report it to the appropriate authorities.

Beyond the Big Island: Lava Tubes on Other Islands

While the Big Island is renowned for its extensive lava tube systems, other Hawaiian islands also have their share of volcanic caves:

Maui:

The Hana Lava Tube (Ka’eleku Cave) is a popular tourist attraction offering guided tours and self-guided exploration. It features unique geological formations and is relatively easy to access. Cost range from $12 per adult, $10 per child. It is typically open from 10:30AM – 4PM.
Oahu: Though less known, Oahu has several smaller lava tubes, often located in more remote areas. These are generally less accessible and require more experienced caving skills. To find some of these tubes, search for Waianae or search on geology websites.
Kauai: Kauai features the caves near Poipu. They have their own unique geological features. Exploring these tubes requires caution and respect for the environment.

FAQ Section

Here are some frequently asked questions about exploring lava tubes in Hawaii:

What are the biggest dangers when exploring lava tubes?

The biggest dangers when exploring lava tubes include falling due to uneven terrain, getting lost in complex systems, encountering hazardous gases (though rare), flash flooding after heavy rain, and potential rockfalls. Always explore prepared.

Is it safe to bring children to lava tubes?

It can be, but it depends on the child’s age and maturity level and the specific lava tube. Nahuku (Thurston Lava Tube) in Hawaii Volcanoes National Park is generally safe for children due to its well-lit and paved pathway. However, more rugged and undeveloped lava tubes are not suitable for young children.

Do I need a permit to explore lava tubes in Hawaii?

You don’t typically need a permit to explore lava tubes within Hawaii Volcanoes National Park or other publicly accessible areas. However, if you’re exploring private property or a restricted area, you will need permission from the landowner or relevant authority.

What kind of wildlife might I encounter in lava tubes?

You might encounter insects, spiders, and bats in lava tubes. In some cases, you may also find cave-adapted species that are unique to these environments. Avoid disturbing any wildlife you encounter.

What should I do if I get lost in a lava tube?

If you get lost, stay calm and try to retrace your steps. Yell for help, and use your flashlight to signal for assistance. If you have a whistle, use it to attract attention. If you informed someone of your plans before entering the lava tube, they will eventually alert the authorities.

References

Hawaii Volcanoes National Park Website
Geological Society of America Publications
Local Tour Operator Websites (Various)

Ready to embark on your own subterranean adventure? Exploring Hawaii’s lava tubes is an unforgettable experience that combines adventure, education, and natural beauty. With careful planning, the right gear, and a deep respect for the environment, you can discover the secrets hidden beneath the islands’ volcanic landscapes. So, grab your headlamp, gather your friends, and prepare to be amazed by the wonders of Hawaii’s underground world. Start planning your trip today and create memories that will last a lifetime!