The best cycling routes in Former Waimanu Estuarine Research Reserve
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Touring cycling routes in Former Waimanu Estuarine Research Reserve are primarily found on roads and trails surrounding the core protected area, which is characterized by rugged terrain and deep valleys. The region features significant elevation changes, with routes often traversing hills and offering views of the coastline and lush Hawaiian landscapes. While the immediate Waimanu Valley is known for challenging hiking, the broader area provides options for touring cyclists on paved and unpaved paths.
Best touring cycling routes in Former Waimanu Estuarine Research Reserve
- The most popular touring cycling route is Waipi'o Valley Road Trail, a 3.8 miles (6.2 km) trail that takes 35 minutes to complete. This moderate route features a significant ascent into Waipi'o Valley.
- Another top favourite among local touring cyclists is Waipi’o Valley Lookout – Old Mamalahoa Highway loop from Puu Pulehu Reservoir Dam, a difficult 40.8 miles (65.6 km) path. This route includes substantial elevation gain and traverses varied terrain.
- Local touring cyclists also love the Old Mamalahoa Highway – Old Mamalahoa Highway loop from Puu Pulehu Reservoir Dam, a 23.9 miles (38.5 km) trail leading through the scenic Old Mamalahoa Highway area, often completed in about 2 hours 40 minutes.
- Touring cycling in Former Waimanu Estuarine Research Reserve is defined by coastal roads, valley descents, and routes through areas of historical significance. The network offers options for different ability levels, from moderate to difficult.
- The guide includes highly-rated routes that showcase the best of the region's landscape. More than 19 touring cyclists have used komoot to explore Former Waimanu Estuarine Research Reserve's varied terrain.
Last updated: August 6, 2026
6.20km
00:35
300m
300m
The Waipi'o Valley Road Trail is a 3.8-mile touring cycling route on the Big Island, known for extreme steepness and stunning views.
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Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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41.1km
02:36
460m
460m
Embark on a difficult touring cycling adventure along the Old Mamalahoa Hwy to Kapuna Road loop, a 25.6-mile (41.1 km) journey on Hawaii's Big Island. This route challenges you with 1496 feet (456 metres) of elevation gain, typically taking about 2 hours and 36 minutes to complete. As you pedal, you will pass through lush rainforests and open green lands, encountering historic century-old bridges and remnants of old sugar mills.
This hard bike ride requires very good fitness due to its significant climbing and rolling hills. The trail consists mainly of paved surfaces, making it ideal for road bikes. You can usually find parking in the Waimea area, which is a good place to begin this scenic loop.
The route offers diverse and picturesque views, including scenic vistas of Onomea Bay and sweeping ocean views along the Hamakua Coast. This journey provides a unique glimpse into the island's past, blending natural beauty with historical landmarks from its sugar cane era.
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33.8km
02:29
800m
800m
Prepare for a challenging touring bicycle ride along the scenic Kohala Coast, where you'll encounter significant climbs and impressive ocean views. This difficult 21.0 miles (33.8 km) route will have you gaining 2620 feet (799 metres) in elevation, taking approximately 2 hours and 28 minutes to complete. As you cycle, you'll pass by the historic Puʻukoholā Heiau National Historic Site, a powerful ancient temple overlooking the Pacific.
Be ready for a demanding ride; the Kohala Coast is known for strong winds that can add to the difficulty, especially during the significant climbs. You will be sharing the road with vehicles for much of the route, as dedicated bike lanes are not always present. The trail concludes at Samuel M. Spencer Beach Park, which offers convenient amenities like restrooms, showers, and picnic tables, making it an ideal spot to relax and refresh after your touring bicycle adventure.
The route offers a unique blend of physical challenge and cultural immersion, leading you past the Puʻukoholā Heiau National Historic Site. This ancient Hawaiian temple, built by King Kamehameha I, provides a profound connection to the island's rich history. Your journey culminates at Samuel M. Spencer Beach Park, where you can enjoy a beautiful white sand beach and calm waters, a perfect reward after conquering the challenging terrain of this touring bicycle route.
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
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Tips from the Community
The steep, short road down to Waipio valley itself is (February 2024) only open to Hawaiʻi residents with ID and driving 4WD. No hikers or cyclists permitted.
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Old Mamalahoa Hwy is a paved scenic road that navigates through Hawaiian jungle and open fields. Throughout the ride you can catch glimpses of the pacific through the trees. If you continue along Old Mamalahoa Hwy, you'll eventually find yourself passing a cafe where they sell smoothies, bagels, and other snacks.
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There is a large farmers market here open sundays 9am to 2pm. There is a nice mix of local foods, produce, and hard goods! For those ballin' on a budget, this market accepts SNAP and EBT.
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There is a spot on the main road where you can star down the valley and see the Nanue Falls. The top of the cliff is about 1600 feet above sea level, 1,200-feet tall, and is ranked number 282 out of 1,000 for the worlds tallest waterfall.
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Spencer Beach is one of the northernmost white-sand beaches on the Big Island. The park is perfect for picnics with amenities including restrooms, showers, drinking water, and a large picnic pavilion. With the shallow water at its shoreline, Spencer Beach Park is an excellent option for kids.
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Spencer Beach has soft, white sandy shores, calm water, bathrooms, and nearby parking. Samuel M Spencer Beach Park is a great daytime destination for beachgoers or a nighttime destination for campers looking to hear the waves crash under while going to bed. It is one of the most northern white sand beaches on the Big Island; much further north, most beaches are rocky.
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The Jodo Shu Mission is a temple, cemetery, and the first sanctioned Buddhist temple in Hawai’i. It was built in 1896 and originally named the “Hāmākua Bukkyo Kaido”, later renamed Hāmākua Jodo Mission. The total cost to build the temple was $3,000, and it was built in between five former sugar plantations. Visitors often come to visit the grave of Katsu Goto, a leader of the Japanese community who died fighting for the rights of immigrant laborers, as this is an important part of Hawai‘ian history.
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Only open on Sundays from 9:00 a.m. to 2:00 p.m. The Hamakua Harvest Farmers Market is at the junction of Mamalahoa Highway 19 and Mamane St Highway 240 on a short side detour on Paau Hua Camp Road. This farmers market is a great way to support local businesses. The mission of this farmers market, as quoted from hamakuaharvest.org, is "to promote and advance Hāmākua agriculture by supporting local farmers, enriching the region’s social fabric, and promoting healthy rural lifestyles for the benefit of Hāmākua’s communities, economy, and environment." So come by and grab a bite after a long ride!
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Frequently Asked Questions
Can I go touring cycling within the Former Waimanu Estuarine Research Reserve?
No, touring cycling is not permitted within the Former Waimanu Estuarine Research Reserve itself. The primary access route, the Muliwai Trail, is rugged, minimally maintained, and explicitly prohibits bicycles due to its challenging and hazardous conditions. The reserve is protected for its unique ecological and cultural significance, making it suitable for strenuous hiking and ecological exploration rather than cycling.
Are there any touring cycling routes available near the Former Waimanu Estuarine Research Reserve?
While cycling is not allowed directly within the reserve, there are several touring cycling routes in the surrounding region that offer challenging rides. For example, you can explore routes like Waipi'o Valley Road Trail, which provides a taste of the area's demanding terrain.
What kind of terrain can I expect on touring cycling routes in the broader region?
The touring cycling routes in the region surrounding the Former Waimanu Estuarine Research Reserve are generally challenging. Many feature significant elevation changes and can be quite long. For instance, the Waipi’o Valley Lookout – Old Mamalahoa Highway loop from Puu Pulehu Reservoir Dam is a difficult route spanning over 65 km with substantial ascents.
What are the longest touring cycling routes in this area?
The longest touring cycling route in the vicinity is the Waipi’o Valley Lookout – Old Mamalahoa Highway loop from Puu Pulehu Reservoir Dam, covering approximately 65.6 km. Another significant option is the Old Mamalahoa Hwy to Kapuna Road loop, which is about 41.1 km long.
Are there any loop touring cycling routes available?
Yes, several loop routes are available for touring cyclists in the surrounding area. You can consider the Waipi’o Valley Lookout – Old Mamalahoa Highway loop from Puu Pulehu Reservoir Dam or the Old Mamalahoa Hwy to Kapuna Road loop for circular rides.
What activities are recommended within the Former Waimanu Estuarine Research Reserve if cycling is prohibited?
The Former Waimanu Estuarine Research Reserve is an exceptional destination for adventurous hikers. The challenging Muliwai Trail offers an 18-mile round trip, leading to the secluded Waimanu Valley. Hikers can experience demanding ascents, traverse multiple gulches, and enjoy views of Wai'ilikahi Falls and a black sand beach. The area is also significant for ecological research and cultural heritage.
Are there any waterfalls or scenic viewpoints accessible by touring bike in the region?
While the famous Wai'ilikahi Falls are deep within Waimanu Valley and only accessible by strenuous hiking, the touring cycling routes in the broader region, such as those along the Old Mamalahoa Highway, may offer scenic viewpoints of the diverse Hawaiian landscape. Specific viewpoints would depend on the chosen route, but the area is known for its natural beauty.
What is the best season for touring cycling in the area surrounding the reserve?
Hawaii generally has a mild climate year-round, but weather conditions can vary. It's always advisable to check local forecasts before planning your ride. The Muliwai Trail, for example, can be extremely slippery and hazardous, especially after rain, which could also impact nearby cycling routes.
Are the touring cycling routes in the region suitable for families or beginners?
The touring cycling routes listed for this region are predominantly rated as 'difficult' or 'moderate', indicating they are generally not suitable for beginners or young families. Routes like Waipi'o Valley Road Trail, while shorter, still involve significant elevation changes. Experienced cyclists seeking a challenge will find these routes more appropriate.
Can I bring my dog on the touring cycling routes or into the reserve?
Bicycles are prohibited within the Former Waimanu Estuarine Research Reserve, and typically, protected natural areas have strict rules regarding pets on trails to protect wildlife. For the touring cycling routes outside the reserve, pet policies can vary. It's best to check local regulations for specific roads or trails regarding dogs before planning your ride.
What kind of wildlife might I encounter on the touring cycling routes?
The region is home to diverse bird species, including the Warbling White-Eye, Red-Billed Leiothrix, Japanese Bush Warbler, Hawaiian Hawk, and White-Tailed Tropicbird. While these are more commonly observed within the protected reserve, you may still encounter various local birds and other wildlife along the cycling routes in the surrounding areas.
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