Big Island’s Best Kept Secrets: Lava Fields, Waterfalls & Stargazing

Heading out to the Big Island, most visitors stick to the well-trodden circuit of Volcanoes National Park and the Kona coffee belt. But the island’s real character lives in the places that take a little more effort to reach — the tide pools where locals bring their families, the lava tubes that swallow sound, and the black sand beaches born from recent eruptions. This guide covers the spots that reward a bit of planning, with the practical details that make the difference between a good trip and a great one.

One thing I’ve learned after years of island-hopping: the best experiences on the Big Island aren’t the ones with the biggest parking lots. They’re the ones that require a short hike, an early alarm, or a willingness to ask a local which access point to use. This guide pulls together the hidden corners that deliver the most return for your effort — from the quiet coves at Puako to the raw coastline reshaped by the 2018 eruption at Pohoiki.

Understanding the Big Island’s Hidden Side

The island’s geography creates a patchwork of microclimates and access challenges that keep the crowds unevenly distributed.

The Big Island is roughly the size of Connecticut, but its road network is sparse. Drive times between Kona and Hilo run about 90 minutes, and many of the best hidden spots sit at the end of unsealed roads or require a hike across lava fields. That friction is exactly what keeps them quiet. The dry months from May to September are ideal for remote beaches, while forest trails in the Hilo and Volcano areas stay accessible year-round — just expect rain.

One honest limitation: many of these spots have no lifeguards, no shade, and no services. The tradeoff is that you’ll often have a place like Makalawena Beach almost entirely to yourself — a white sand crescent that feels like it belongs on a deserted island, reachable only by a 20-minute hike across lava fields from the Kekaha Kai State Park parking lot.

Where to Go: Lava Tubes, Tide Pools, and Valley Lookouts

Kaumana Caves — A Lava Tube That Swallows Sound

Formed by the 1881 Mauna Loa eruption, Kaumana Caves offers a raw, uncommercialised underground experience. Unlike the polished boardwalks of Thurston Lava Tube in Volcano National Park, this one drops you straight into a cool, damp tunnel where mineral threads sparkle in your headlamp beam. The temperature stays at a constant 60°F year-round. Bring two light sources and sturdy shoes — the floor is uneven and slippery. The caves are free to explore, but never enter during heavy rain, and avoid touching the delicate formations.

Puako Tide Pools — Snorkeling Without the Crowds

Puako is where local families bring their kids to snorkel. The calm, protected waters along this quiet coastal village offer easy access to colourful fish, sea turtles, and healthy coral reefs just steps from shore. Park for free along Puako Beach Drive and explore multiple access points. The best snorkeling is near the rocky outcroppings at low tide. Bring reef-safe sunscreen and water shoes — the lava rock can be sharp. This spot is perfect for beginners and kids, but the parking fills quickly on weekends.

Pololu Valley Lookout — Waipiʻo’s Quieter Sister

Often overlooked in favour of Waipiʻo Valley, Pololu Valley offers a similar dramatic landscape with far fewer people. The 20-minute hike down to the valley floor rewards you with a secluded black sand beach, ironwood trees, and dramatic coastal cliffs. Unlike Waipiʻo, you can access this beach on foot without a guided tour. The trail can be muddy and slippery after rain — good hiking shoes with traction make a real difference. Swimming is not recommended due to strong currents, but the views and peaceful atmosphere make the hike worthwhile. Combine it with a visit to nearby Hawi town for lunch.

Practical Planning for the Hidden Spots

Timing, access, and preparation determine whether these spots feel like a reward or a hassle.

Getting There — Roads and Reality

The access road to Mahaiʻula and Makalawena within Kekaha Kai State Park is rough — drive slow and low. Most rental cars can handle it if you take your time, but when in doubt, park along the highway and walk. For Waipiʻo Valley, the road down is one of the steepest in the US — only attempt with a guided tour. The Waipiʻo Valley Shuttle Tour is the safest way to experience the valley floor and its taro fields.

Best Time to Visit

Dry months from May to September are ideal for remote beaches. Shoulder seasons bring fewer people overall. Forest trails in the Hilo and Volcano areas shine year-round, but you should prep for rain. For Rainbow Falls, arrive before 7 AM to have the 80-foot waterfall almost entirely to yourself — the morning light creates rainbows in the mist. After Rainbow Falls, continue up to Boiling Pots and Pe’epe’e Falls for even fewer crowds.

On the Ground: What to Know Before You Go

Packing for the Day

Many of these spots have zero shade and no services. A solid packing strategy makes the difference between a great day and a miserable one. Bring more water than you think you need, a hat, and reef-safe sunscreen. A lightweight daypack with a hydration sleeve helps keep your hands free for the uneven terrain. For the caves, a headlamp is non-negotiable — the darkness is absolute. Keep a “car kit” with a headlamp, small first-aid kit, extra water, a towel, and a brush for your boots to prevent spreading Rapid ʻŌhiʻa Death between forest areas.

Respecting the Land and Culture

Heiau (temples), petroglyphs, rock walls, and burial sites are kapu — look, don’t touch, and stay on marked paths. The Puʻu Loa Petroglyphs in Hawaiʻi Volcanoes National Park offer a boardwalk through a sea of pāhoehoe where thousands of kiʻi pōhaku (pecked images) record generations of life. Visit at sunrise or sunset when shadows make the carvings sing. Never touch or step on the petroglyphs. If cultural practitioners are present, give them space and aloha.

Ocean Safety and Local Etiquette

When in doubt, don’t go out. If there’s no lifeguard, assume conditions are hazardous. At Kehena Black Sand Beach, waves can be strong — only swim if you’re comfortable with ocean conditions. The beach is clothing-optional, so respect the local culture and leave no trace. Sunday afternoons often feature drum circles and impromptu beach gatherings. Don’t leave valuables visible at trailheads and beach parks. Drones are not allowed in national parks and are restricted in many areas — check rules before flying.

Big Island Hidden Gems — Your Questions Answered

What’s the best season for Big Island hidden gems?

Dry months from May to September are great for remote beaches like Makalawena and Kehena. Shoulder seasons bring fewer people overall. Forest trails in the Hilo and Volcano areas work year-round — just prep for rain if you’re heading that way.

Do I need 4×4 for these spots?

Usually no. The road to Mahaiʻula is rough but passable if you go slow. For Waipiʻo Valley, the road is one of the steepest in the US — only attempt with a guided tour. When in doubt, park along the highway and walk the last stretch.

Are these spots good for kids?

Many are, with caution. Puako tide pools are calm and perfect for beginners. Steep or surf-exposed places like Pololu Valley and Pohoiki require close supervision. The caves at Kaumana are exciting for older kids but the uneven floor and absolute darkness can be intimidating for younger children.

What’s the biggest mistake visitors make at these hidden spots?

Underestimating the lack of facilities. No shade, no water, no bathrooms, and often no cell service. People show up at Makalawena with a single water bottle and no hat, then have to cut their day short. Bring at least one litre per person per hour you plan to be out.

How do I be respectful at cultural sites?

Stay on marked paths, don’t touch or sit on rock features, keep voices low, and pack out everything. At Puʻu Loa Petroglyphs, never step off the boardwalk. If local practitioners are present, give them space. The cultural sites are kapu — look, learn, and leave them exactly as you found them.

The Big Island doesn’t hide its best places behind gates or admission fees — it hides them behind a 20-minute hike across lava, a steep trail down a valley wall, or an early alarm that gets you to Rainbow Falls before the tour buses. That friction is the point. It filters out the casual visitor and leaves the quiet, the wild, and the genuinely memorable for those willing to put in the work. For a deeper dive into the island’s volcanic landscapes, check out our guide to witnessing the creation of new land on the Big Island.

Sources and further reading

Local Tips & Hidden Gems on the Big Island. Big Island Best Activities.

Hidden Gems of the Big Island. Big Island Bulletin.