Old Onomea Road via Mamalahoa Highway loop

The loop is approximately 7.3 kilometers (4.5 miles) long and typically takes about 30-35 minutes to complete by touring bicycle, depending on your pace and how often you stop to enjoy the scenery.

Yes, this specific loop is rated as easy. The Old Onomea Road section is generally considered pleasant and easy, though the overall loop includes sections of Mamalahoa Highway (Route 19) which may have undulating terrain. It's a good option for those looking for a scenic and manageable ride.

The Old Onomea Road section is a winding, narrow, paved road that meanders through dense rainforest, often described as a 'living green tunnel.' You'll cross centuries-old narrow bridges over gulches and streams. The loop also incorporates sections of the main Mamalahoa Highway, which features undulating terrain with quick downhills and moderate climbs.

You can expect lush tropical scenery, historic charm, and glimpses of the Pacific Ocean through the foliage. The route is filled with vibrant tropical plants, ginger blossoms, and wild orchids. You'll also pass by the Hawaii Tropical Botanical Garden.

Key highlights include the picturesque Kawainui Stream Bridge and the scenic stretch of Old Mamalahoa Highway itself, which offers a journey through a 'living green tunnel' of rainforest. You'll also catch views of Onomea Bay and pass by the Hawaii Tropical Botanical Garden.

While specific parking areas aren't detailed, cyclists typically access the Old Onomea Road from either end, often near the junctions with Mamalahoa Highway (Route 19). Look for safe roadside parking spots or designated pull-offs that allow for easy and safe access to the loop.

The Big Island's weather is generally pleasant year-round. However, the Hilo side, where this loop is located, is known for its rain. Cycling during the drier months (typically May to October) might offer more consistent sunny weather, but be prepared for potential rain showers at any time, which can make roads slippery.

No, there are no specific permits or entrance fees required to cycle the Old Onomea Road via Mamalahoa Highway loop itself, as it uses public roads.

As this route primarily uses public roads, dogs are generally permitted if kept on a leash and under control. However, please be mindful of traffic, especially on sections of Mamalahoa Highway, and ensure your dog is comfortable with cycling conditions.

While the Old Onomea Road section has significantly less traffic, sections of the main Mamalahoa Highway (Route 19) can have narrow or non-existent shoulders, fast-moving traffic, and large trucks. Exercise caution, especially on wet days when roads can be slippery. Always ride single file and as far to the right as practicable, following Hawaiian cycling laws.

Yes, the route incorporates sections of the official Old Mamalahoa Highway (also known as Onomea Road) and is near the Onomea Bay Trail, offering opportunities to explore the area further.