The best road cycling routes around Mauna Loa

Embark on a challenging road cycling journey from Keauhou Bay to Hoʻokena Beach Park, a difficult 34.6-mile (55.7 km) route that showcases the Big Island's diverse beauty. You'll climb 3669 feet (1118 metres) over approximately 3 hours and 19 minutes, traversing from panoramic ocean views through dense old-growth Hawaiian jungle along the Old Mamalahoa Highway, eventually reaching coastal ranch lands. The highlight is Hoʻokena Beach Park, known for its unique black and white sand and large shade trees, offering a rewarding finish to this demanding ride. This route is best suited for experienced cyclists with very good fitness.

To tackle this significant elevation gain and distance, plan your ride for the cooler morning hours. Parking is available at Keauhou Bay, serving as the convenient starting point for your adventure. Ensure you bring ample hydration and nutrition, as this point-to-point route requires self-sufficiency and preparation for a sustained effort under the Hawaiian sun.

Beyond the physical challenge, this route offers a deep dive into Hawaiian culture and natural history. Hoʻokena Beach Park, your destination, is not just a scenic spot but also historically significant as one of the last active Hawaiian canoe fishing villages and a former inter-island steamship mooring site. The blend of coastal and inland environments, from lush jungle to unique beach geology, makes this one of the more popular cycling trails Keauhou to Hoʻokena for those seeking more than just a workout.

Embark on a truly difficult racebike challenge along Mauna Loa Road, a 23.3 miles (37.5 km) ascent with a substantial 2799 feet (853 metres) of elevation gain. This demanding route, taking approximately 7 hours and 58 minutes, guides you through a dramatic shift in scenery. You'll cycle past lush koa forests before entering vast, otherworldly lava fields, with panoramic views opening up as you climb towards the Mauna Loa Lookout.

Prepare for a significant physical test, as the high altitude means you'll be contending with reduced oxygen levels. While primarily paved, some sections of the road may present rough patches or compact gravel, so ensure your bike is suitable for varying conditions. Starting your ride early in the day is advisable to maximize daylight and avoid the midday heat. You'll find the upper stretches of the Mauna Loa Access Road offer a more secluded cycling experience with less traffic.

This unique journey is set within Hawaiʻi Volcanoes National Park, allowing you to witness the raw power of volcanic geology firsthand. The route traverses distinct ecological zones, from ancient vegetation islands known as kipuka to recently formed lava flows. It offers a rare opportunity to experience the stark beauty and immense scale of one of Earth's most active volcanoes, providing expansive vistas across the park and out to the Pacific Ocean.

The Two Step Beach to Kealakekua Bay State Historical Park loop is a fantastic road cycling adventure, offering continuous ocean views and unique lava rock formations along the Kona Coast. You'll cruise past the vibrant waters of Honaunau Bay and the historic Kealakekua Bay, where you might even spot spinner dolphins or sea turtles. This easy 11.0-mile (17.7 km) route, with its well-paved surfaces and gentle 948 feet (289 metres) of elevation gain, is a rewarding ride for anyone.

Planning your visit is straightforward; aim to start your ride in the morning to enjoy cooler temperatures and avoid peak traffic. While there's no specific mention of parking for Two Step Beach, the area is generally accessible. The loop typically takes about 1 hour and 5 minutes to complete, making it a perfect morning activity before the day heats up.

This route stands out for its blend of natural beauty and historical significance. Kealakekua Bay State Historical Park is not only a Marine Life Conservation District teeming with marine life but also the landing site of Captain Cook. Nearby, Two Step Beach, known for its natural rock steps, offers excellent snorkeling opportunities right next to Puʻuhonua o Hōnaunau National Historical Park, adding a rich cultural layer to your cycling experience.

Cycle the Nāʻālehu to Pāhala loop, a moderate 28.5-mile route through Kaʻū Forest Reserve with ocean views and challenging climbs.

Embark on a difficult 27.2 miles (43.7 km) road cycling loop from Waiʻōhinu to the South Point Cliff Dive. This challenging ride, which takes around 7 hours and 58 minutes, offers a unique journey through the Kaʻu district. You will gain 2305 feet (702 metres) as you cycle past vast lava flows and lush tropical vegetation. As you approach South Point, the landscape shifts to a desolate beauty, marked by wind-bent trees and dramatic cliffs where waves crash against the shore. Keep an eye out for the famous Wind Blown Tree, a distinctive landmark along the route.

Before you set out on this loop, be ready for challenging conditions, especially the strong winds common around South Point. The intense sun means shade is scarce, so you should bring plenty of water and adequate sun protection. It is important to note that the direct access roads leading to the South Point Cliff Dive are unpaved. These sections are not suitable for standard road bikes, so plan your approach accordingly.

This route stands out for its dramatic and unique scenery, showcasing the raw beauty of the Kaʻu district. You will experience a powerful visual journey, from the vast lava flows to the endless deep blue ocean and rolling hills. The transformation of the landscape, from high tropical vegetation to a desolate, wind-swept coastline, highlights the diverse natural environment of this part of the island.

Crater Rim Drive offers an easy road cycling experience, covering 13.3 miles (21.5 km) with a gentle 792 feet (241 metres) of elevation gain, typically completed in about 58 minutes. You will cycle through a dramatic landscape, transitioning from lush rainforests to barren lava fields. Expect unparalleled views of active volcanic craters like Kilauea Caldera and Halemaʻumaʻu Crater, and observe steaming vents at Kūkamāhuākea, providing a front-row seat to Hawaii's powerful volcanic activity.

When planning your visit, be aware that the road is open to vehicles, so you will share the route with cars and buses, especially between 10 AM and 3 PM. Weather conditions can change quickly here; you might experience hot sun, wind, and rain all within the same hour. It's always a good idea to check park conditions before you go, as parts of the road might close due to volcanic activity or maintenance.

This route offers a unique perspective on the Kilauea Volcano, allowing you to witness an active volcanic landscape up close. The drive highlights the island's dynamic geology, moving from dense, green rainforests to stark, recent lava flows. You'll find excellent viewpoints along the way, such as the Keanakākoʻi Crater Overlook, providing clear sights of the craters and steaming vents.

Embark on a challenging road cycling ascent up Mauna Kea Access Road to the Maunakea Visitor Information Station. This moderate route spans 12.9 miles (20.7 km) and demands a significant 2667 feet (813 metres) of elevation gain, typically taking about 1 hour and 32 minutes. As you climb, you'll experience a dramatic shift in scenery, moving from lush, humid environments into drier, more barren, and eventually volcanic landscapes, often rising above the clouds for expansive views.

Prepare for the altitude; less oxygen at higher elevations means altitude sickness can be a concern, especially if you are coming from sea level. Beyond the Maunakea Visitor Information Station, the road turns into an unpaved, extremely challenging gravel section, making it unsuitable for standard road bicycles. Always plan carefully, bring sufficient hydration, sun protection, and layered clothing to adapt to rapid weather changes on the mountain.

This route offers a unique opportunity to cycle through the Mauna Kea Forest Reserve, showcasing Hawaii's diverse ecosystems. From the Visitor Information Station, you can take in panoramic views across the island, including Mauna Loa. The journey highlights the stark beauty of the volcanic terrain and the transition zones that define this iconic Hawaiian peak.

If you're seeking a road cycling adventure that truly tests your legs and rewards you with stunning coastal vistas, the Ho'okena to Miloli'i Beach Park route delivers. This difficult 39.3-mile (63.3 km) journey along the Big Island's coast features a substantial 3943 feet (1202 metres) of elevation gain, typically taking around 3 hours and 25 minutes. You'll traverse varied Hawaiian scenery, from ancient lava fields and 'ōhi'a forests to dramatic ocean views, particularly along the Māmalahoa Highway.

Planning your ride requires careful consideration; this route is best for very fit, experienced cyclists. Services are limited, so you'll need to carry all your water and supplies. The route utilizes public roads like Highway 11, which may have narrow or non-existent shoulders, so defensive riding and high visibility are essential for safety. Consider starting early to make the most of the day and avoid peak traffic.

This route is more than just a ride; it's a journey through a historically rich part of Hawaii. You'll pass Ho'okena Beach Park, once a bustling 19th-century port, and finish near Miloli'i Beach Park, often called the last fishing village in Hawaii. The challenging terrain and unique cultural context make this one of Hawaiʻi County's most distinctive road cycling routes.

This challenging 47.5-mile road cycling route from Miloliʻi Beach Park to Kahuku offers dramatic volcanic scenery and 3022 feet of elevation