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Experience the Big Island’s night sky and solar wonders with this 7-hour guided tour including Rainbow Falls, lava caves, and stargazing with high-powered telescopes.

The Maunakea Stellar Explorer HILO tour offers a captivating blend of land and sky adventures on the Big Island of Hawaii. Priced at $240.73 per person, this 7-hour experience stands out by combining daytime explorations like Rainbow Falls and Kaumana lava caves with extraordinary nighttime star gazing using state-of-the-art telescopes.
This tour is specially designed for those seeking both scenic beauty and a deep dive into astronomy, with round-trip hotel pickup, making logistics straightforward. It is notably booked 35 days in advance on average, indicating strong interest and trust in this engaging experience. While the tour offers remarkable views and expert guidance, keep in mind that weather conditions can affect the star gazing, and some stops may be less accessible than expected, as experienced by a few reviews.

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The day begins in Hilo, where Rainbow Falls greets visitors with its 80-foot twin waterfalls. Known for creating a rainbow effect in the mist, this spot offers a beautiful, iconic Hawaiian landscape. The admission is included, and visitors have about 20 minutes to enjoy the view and capture photos.
Following Rainbow Falls, the tour continues to Boiling Pots along the Wailuku River. Here, the river’s turbulent flow creates depressions that resemble boiling water, providing great photo opportunities. Like Rainbow Falls, this stop lasts about 20 minutes and is included in the tour price.
Next, the Kaumana Caves Park features a lava tube system dating back to 1881. Visitors explore the cathedral-like space inside the caves, gaining a sense of Hawaii’s volcanic activity. The lunch break takes place here, with a picnic-style meal enjoyed above the caves. This stop lasts approximately one hour and is included in the tour.

The highlight of the tour is Mauna Kea, where astronomy experts set up large aperture Dobsonian telescopes. The fast focal ratio of these telescopes allows for wide-field views of galaxies, nebulae, star clusters, and planets that are not typically visible with standard telescopes.
The guides explain the celestial objects in detail, making this an informative experience. Depending on current sky conditions and weather, visitors might see galaxies, nebulae, star systems, the Moon, and planets like Jupiter and Saturn. This star gazing session lasts about 1 hour and 30 minutes.
After dark, the tour proceeds across Saddle Road, situated between Mauna Kea and Mauna Loa. A National Park Service-trained guide offers insights into the volcanology, geology, and history of these massive volcanoes. During this drive, the guide introduces visitors to lava flows and the local flora and fauna.
A solar telescope is set up by the guide for sun viewing. When weather permits, this provides a chance to see solar flares, sunspots, prominences, and other solar activity in true color. The solar observation lasts about one hour, giving a rare opportunity to see the Sun in a controlled and safe manner.

The tour offers a balance between terrestrial landscapes and celestial wonders. The stops at Rainbow Falls, Boiling Pots, and Kaumana Caves showcase Hawaii’s volcanic and water features, while the Maunakea star gazing and solar viewing reveal the heavenly beauty above.
Traveling across Saddle Road provides breathtaking views of volcanic mountains and lava flows, enriching the scientific discussion led by the guides. The combination of land exploration and star gazing makes this tour particularly satisfying for those who want a comprehensive Big Island experience.

The tour departs daily from 93 Banyan Dr, Hilo, at 3:30 pm, with hotel pickup and drop-off included, streamlining the process for guests. The tour ends back at the original meeting point, making it convenient for guests staying in Hilo or nearby accommodations.
Group sizes are capped at 26 travelers, ensuring a comfortable and engaging atmosphere. Beverages, bottled water, coffee, and tea are included, along with a dinner during the day. The dinner offers a picnic-style meal with a view, adding a relaxed element before the evening star gazing.

Multiple reviews praise the guides, mentioning Nate and Rich as knowledgeable, passionate, and friendly. They are skilled at sharing Hawaiian culture, geology, and astronomy in an engaging way. Guests appreciate how guides prepare everything, including dinner, snacks, water, and warm jackets.
Some reviews highlight how the guides manage the pace, ensuring the stops are well-timed and not rushed. The guides’ storytelling abilities and enthusiasm significantly enhance the overall experience.
At $240.73, this tour offers a comprehensive package that includes transport, guided commentary, dinner, and access to high-powered telescopes. It is booked approximately 35 days in advance, making it a popular choice.
The tour features free cancellation, allowing guests to cancel up to 24 hours before for a full refund. Some reviews mention initial booking challenges or cancellations by the company, so booking well in advance and confirming details is advisable.
Weather plays a crucial role in the experience, especially for star gazing and solar viewing. Several reviews note less-than-ideal conditions impacting the visibility of celestial objects or the clarity of the Sun.
Plus, some stops may not meet expectations—such as not visiting the observatory—due to operational limitations or weather. Guests should be prepared for variable conditions and dress warmly, as it can be significantly cooler at Maunakea at night.
This tour provides a well-rounded experience combining Hawaiian natural beauty with astronomical wonders. The expert guides and high-tech telescopes make the night sky accessible and awe-inspiring, while the daytime stops introduce visitors to Hawaii’s volcanic geology and water features.
It is especially suited for those interested in astronomy, geology, and Hawaiian scenery, offering good value for its comprehensive itinerary. However, travelers should consider the weather and availability of clear skies before booking. Overall, it stands as a unique way to explore some of Hawaii’s most striking terrestrial and celestial sights.
“The tour guide was outstanding, and completely knowledgeable in the solar system. It was like a NASA experience in the earth, in this case, in beau…”
What is included in the tour price?
The price covers hotel pickup and drop-off, all stops (Rainbow Falls, lava caves), dinner, beverages, and access to telescopes for star and solar viewing.
How long does the tour last?
The entire experience is approximately 7 hours, starting at 3:30 pm and ending back at the meeting point.
Are the telescopes suitable for detailed astronomy?
Yes, the tour uses high-powered telescopes, including Dobsonian models that provide wide field views of galaxies, nebulae, planets, and stars.
Can I see the Sun during the tour?
Yes, solar viewing is available during the day using a solar telescope, weather permitting, to observe solar flares, sunspots, and other activity.
Is this tour suitable for children or elderly guests?
It is generally suitable for most travelers; however, dress warmly for nighttime, and be aware of walking or standing during stops. The moderate walking and outdoor conditions should be manageable for most.
What happens if the weather is poor?
The tour is weather-dependent. If conditions prevent star or solar viewing, the tour may be canceled or rescheduled, with full refunds or alternative dates offered.
Are there any dietary accommodations?
Yes, guests should notify the tour provider of special dietary needs such as vegetarian, gluten-free, or allergies, either during booking or via the management system.
Is this tour suitable for solo travelers?
Absolutely, the group size is limited to 26, and the experience is designed to be engaging for individuals, families, and small groups alike.
How do I book this tour?
Reservations can be made online through the provider’s booking platform, and early booking is recommended due to the tour’s popularity.
What makes this tour different from other Big Island excursions?
Its combination of land exploration with expert-guided astronomy—featuring state-of-the-art telescopes and solar viewing—sets it apart from conventional sightseeing trips.