The best walks and hikes in KaʻŪ Forest Reserve
5.0
(7)
36
hikers
11
hikes
Hikes in Kaʻū Forest Reserve explore the southeastern slopes of Mauna Loa on the island of Hawaiʻi. The terrain is defined by its volcanic geology, featuring routes that cross lava flows, open grasslands, and native koa and ʻōhiʻa forests. Many of the marked hiking trails are located within the Kahuku Unit of Hawaiʻi Volcanoes National Park, a former cattle ranch now managed for conservation and recreation.
Best hiking trails in KaʻŪ Forest Reserve
- The most popular hiking route is Kona Trail Loop — Kahuku Unit — Hawai‘i Volcanoes National Park, a 7.1 mile (11.5 km) trail that takes around 3 hours 20 minutes to complete. This moderate route follows old ranch roads through pastureland and forested areas.
- Another top favourite among local hiking enthusiasts is Forested Pit Crater — Kahuku Unit — Hawai‘i Volcanoes National Park, a moderate 4.7 mile (7.6 km) path. The trail leads to the edge of a large pit crater containing a section of native rainforest.
- Local hiking enthusiasts also love the Pu‘u o Lokuana Cinder Cone Trail Loop — Kahuku Unit — Hawai‘i Volcanoes National Park, a 2.7 mile (4.4 km) trail leading through volcanic landscapes, often completed in about 1 hour 10 minutes.
- Hiking in Kaʻū Forest Reserve is defined by its varied volcanic features, including cinder cones, pit craters, and historic lava flows. The network of trails in the Kahuku Unit offers both easy and moderate options for different ability levels.
- The routes in Kaʻū Forest Reserve are highly rated by the komoot community with an average score of 5.0 stars from a number of reviews. More than 30 hikers have used komoot to explore Kaʻū Forest Reserve's varied terrain.
Last updated: July 1, 2026
5.0
(3)
12
hikers
7.56km
02:27
340m
340m
The Pit Crater Trail offers a fascinating journey into a preserved ancient Hawaiian rainforest, hidden within a collapsed pit crater. As you hike, you'll move through green pastureland and woodland meadows, crossing 1868 lava flows from Mauna Loa that showcase unique geological features like lava trees. The trail's main draw is the Forested Pit Crater, a natural sanctuary whose sheer walls protect a dense canopy of native koa and ʻōhiʻa lehua trees, providing a rare look at Hawaiʻi's landscape before human impact.
Planning your visit to this trail in the Kahuku Unit of Hawaiʻi Volcanoes National Park requires a few considerations. You'll need to use a boot decontamination station to help prevent the spread of Rapid ʻŌhiʻa Death, protecting the island's vital ʻōhiʻa trees. The 4.7-mile (7.6 km) route from the Pit Crater Trailhead involves a strenuous 1125 feet (343 metres) of elevation gain and takes about 2 hours and 26 minutes, so be prepared for a solid workout. For a slightly easier start, consider the Pali o Kaʻeo Trailhead, though it adds 2.4 miles (3.9 km) to your overall distance.
What makes this trail truly special is the collapsed pit crater itself, acting as a natural fortress for an unspoiled native rainforest. This unique ecosystem within the crater is home to over 100 plant species, many of which are rare and endangered, offering a living window into ancient Hawaiʻi. Remember to stay clear of the crater's edge due to erosion, ensuring you can safely appreciate this remarkable natural wonder and its rich biodiversity.
5.0
(2)
6
hikers
4.41km
01:12
70m
70m
The Pu'u o Lokuana Trail offers a captivating and easy 2.7-mile (4.4 km) hike through a landscape shaped by both volcanic activity and human history. With only 224 feet (68 metres) of elevation gain, taking about 1 hour and 12 minutes, you'll traverse old ranch roads, grassy pastures, and ancient lava flows. The route culminates at the Puʻu o Lokuana cinder cone, where you can explore a historic "crimson heart" quarry and enjoy panoramic views of the Kahuku area and the Kaʻū coastline.
Planning your visit is straightforward, though sturdy footwear is advisable for the varied, sometimes rocky and grassy terrain, especially on the ascent to the cinder cone. As with many Hawaiian trails, an early start or late afternoon hike can provide cooler temperatures and optimal lighting for the scenic viewpoints. There are also longer Pu'u o Lokuana Trail loop options if you want to extend your adventure.
This trail is notable for its rich historical context; the cinder cone was once significantly taller before being mined for its vibrant cinders, and it even housed a secret radio station during World War II. It's a fantastic way to experience the dynamic interplay of natural features like magma formations and grasslands with significant human events, offering a unique glimpse into the Kahuku landscape.
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2
hikers
11.5km
03:23
330m
330m
The Kona Trail Loop is a fantastic way to immerse yourself in the natural beauty of the Big Island, offering a diverse landscape that feels both wild and accessible. You'll traverse sections of the Lower Kona Trail, where the path winds through lush, tropical vegetation, providing a refreshing escape into nature. The atmosphere is generally peaceful, allowing you to connect with the island's unique environment away from the more crowded spots.
Planning your visit to this Kona Hawaii hiking trail is relatively simple, as the R.O.D. Gate and Trailhead serves as a convenient starting point with available parking. While no permits are required, it's always a good idea to check local conditions before you go. Starting your hike in the early morning is recommended to enjoy cooler temperatures and avoid the peak sun, ensuring a more comfortable experience on the trail.
This moderate 7.1-mile (11.5 km) loop, with its 1097 feet (334 metres) of elevation gain and estimated 3 hours and 22 minutes duration, is a great option for those looking for a substantial hike without being overly strenuous. It offers a good balance of challenge and reward, making it a popular choice among Kona hiking trails. The trail provides a wonderful opportunity to experience the island's unique ecosystem and enjoy some quality time outdoors.
11.6km
03:24
340m
340m
The Glover Trail Loop — Kahuku Unit offers a rewarding moderate hike, guiding you through a landscape punctuated by unique natural features. You'll pass an Ancient Ōhiʻa Tree, a significant part of the local ecosystem, and encounter a Forested Pit Crater, adding a touch of geological wonder to your journey. This 7.2-mile (11.6 km) loop involves 1103 feet (336 metres) of elevation gain, making it a good choice for hikers seeking a consistent workout over approximately 3 hours and 24 minutes.
For planning your visit, the trailhead is conveniently located at the R.O.D. Gate and Trailhead, where parking is available. It's always a good idea to start your hike earlier in the morning to make the most of cooler temperatures and ensure you have plenty of daylight. Remember to bring enough water, as conditions can be warm.
This loop provides an excellent opportunity to explore the Kahuku Unit, offering a blend of natural beauty and moderate physical challenge. It's a great way to experience the unique environment of Hawaiʻi County, suitable for those who appreciate a well-defined trail with interesting natural landmarks.
6
hikers
9.27km
02:47
320m
320m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Popular around KaʻŪ Forest Reserve
Tips from the Community
Great path, which is easy to walk on and you can walk side by side
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There is a nice picnic table with an amazing view of the surrounding forest reserve. This area was acquired by purchasing a large portion of a cattle farm. The area is still being developed, but most of the trails and view here are ready to go!
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Reaching Kamakapa‘a peak is a relatively easy run thanks to the flat terrain. At the summit, take in sweeping views encompassing the expansive breadth of lower Kaʻū, an exceptional panorama as your reward for the moderate ascent.
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This spur trail leads towards the Lava Flow of 1926 and deposits runners at the base of an old Ōhiʻa tree. Ōhiʻa trees are native to Hawai'i and form an important part of Hawai'ian history and culture. Its famous flowers come in shades of white, yellow, and red. The Ōhiʻa tree is a keystone species in Hawai'ian rainforests, and has evolved remarkable adaptations to thrive in harsh volcanic conditions amongst sulfuric gasses. Recently Ōhiʻa trees have been in danger from fungal diseases termed Rapid Ōhiʻa Death (R.O.D.). This is why visitors are asked to disinfect their boots before entering the northern region of the Kahuku Unit.
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This spur trail leads towards the Lava Flow of 1926 and deposits hikers at the base of an old Ōhiʻa tree. Ōhiʻa trees are native to Hawai'i and form an important part of Hawai'ian history and culture. Its famous flowers come in shades of white, yellow, and red. The Ōhiʻa tree is a keystone species in Hawai'ian rainforests, and has evolved remarkable adaptations to thrive in harsh volcanic conditions amongst sulfuric gasses. Recently Ōhiʻa trees have been in danger from fungal diseases termed Rapid Ōhiʻa Death (R.O.D.). This is why visitors are asked to disinfect their boots before entering the northern region of the Kahuku Unit.
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The R.O.D. gate is currently the northernmost parking area in the Kahuku Unit. Here visitors must disinfect their boots to avoid spreading Rapid ʻŌhiʻa Death (a disease that affects the native ʻŌhiʻa trees) within the park. All routes to the Kona Trail and Glover Trails start here with a 1.2 mile walk up the R.O.D. road. The ridgeline Pali o Ka‘eo Trail (which provides views of the coast, and Pit Crater Trail to the Forested Pit Crater are also accessible to the east of the gate.
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The Kona Trail takes hikers through pastures that used to be part of the Kahuku ranch. Before cowboy culture was popularized in the western U.S., Hawaiian cowboys called Paniolo wrangled cattle across Hawai'i. Cattle were introduced to Hawai'i in 1793 and rapidly grew out of hand, eating the thatch roofs off of villages and destroying fields of crops. From the mid-1800s through 2003 when the Kahuku Unit was annexed to the park, Kahuku ranch trained capable paniolo who battled the volcano and demands of the landscape to make a living.
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The 250 foot high walls of the Forested Pit Crater have protected the flora and fauna within from ecological changes caused by ranching in Kahuku. The crater is a time capsule of the natural landscape, and harbors many unique endangered species.
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Frequently Asked Questions
Do I need a permit to hike in the Kaʻū Forest Reserve area?
For the main hiking trails located within the Kahuku Unit of Hawaiʻi Volcanoes National Park, no special permits are required for day hiking. Access is generally open during park hours. However, the broader Kaʻū Forest Reserve is managed separately for conservation and other uses like hunting, which may require permits. For the most current trail access information, it's best to check the official Hawaiʻi Volcanoes National Park website.
How do I get to the Kahuku Unit and is there parking?
The Kahuku Unit is located on the mauka (inland) side of Highway 11 between mile markers 70 and 71. There is no public transport to the entrance. You will need a car to get there. Once you enter, there is a designated visitor parking area near the start of the main trails.
Are there any easy, family-friendly hikes?
Yes, the area offers several easier options. The Pu‘u o Lokuana Cinder Cone Trail Loop is a great choice, offering a relatively short walk with rewarding views from the top of a cinder cone. The Kamakapaʻa Trail is another easy 0.5-mile walk through meadows, perfect for a quick outing with panoramic views.
What is the landscape like on the trails?
Hiking here takes you through a unique mix of environments shaped by Mauna Loa. Expect to see historic ranch pastures, native forests of koa and ʻōhiʻa trees, and dramatic volcanic features like cinder cones and old lava flows. The terrain is a testament to the area's past as both a cattle ranch and an active volcanic zone.
Are there any circular walks or loop trails?
Many of the popular trails are loops that start and end at the main trailhead. The Kona Trail Loop is a longer loop that follows old ranch roads through varied scenery. For a more moderate option, the Glover Trail also offers a satisfying circular route through pastureland and forest.
What kind of wildlife can I see?
The Kahuku Unit is a fantastic place for birdwatching. Keep an eye out for native forest birds like the ʻapapane, ʻamakihi, and ʻelepaio. You might also spot the Hawaiian hawk, or ʻio, soaring overhead. The forests are vital habitats for these endemic species.
Are dogs allowed on the trails in the Kahuku Unit?
No, pets are not permitted on any of the trails within the Kahuku Unit. This policy is in place to protect the sensitive native ecosystems and wildlife, including ground-nesting birds.
Can I go camping in the Kaʻū Forest Reserve or Kahuku Unit?
No, there is no camping of any kind permitted within the Kahuku Unit of Hawaiʻi Volcanoes National Park. All hiking trails in this area are for day use only.
Are there any waterfalls in this area?
The trails in the Kahuku Unit are located on the drier, leeward slopes of Mauna Loa and are not known for waterfalls. The landscape is characterized more by its volcanic features, forests, and panoramic views rather than streams or waterfalls.
What makes the Forested Pit Crater hike special?
The hike to the Forested Pit Crater is a strenuous but rewarding journey. Its main highlight is the destination: the rim of a massive pit crater. Peering inside, you can see a pristine, isolated rainforest that has thrived within the crater's protected walls, offering a glimpse into a unique, self-contained ecosystem.
What do other hikers think of the trails in Kaʻū Forest Reserve?
The trails are very highly rated by the komoot community, with an average score of 5.0 stars. Hikers often praise the well-maintained paths, the stunning volcanic landscapes, and the peaceful atmosphere away from the larger crowds of the main park.
What should I bring for a hike in the Kahuku Unit?
Be prepared for changing weather. Essential items include:
Sturdy footwear: Trails cross uneven lava rock.
Water and snacks: There are no food or water facilities available.
Sun protection: Sunscreen, a hat, and sunglasses are crucial as much of the hiking is exposed.
Rain gear: Rain can move in quickly at this elevation.
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