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No traffic touring cycling routes in Hilo Forest Reserve traverse a landscape dominated by dense tropical rainforest, characterized by a thick canopy of native ʻōhiʻa and koa trees. The region experiences significant rainfall, which feeds numerous waterfalls and supports diverse plant life. Elevations range from approximately 2,000 to 6,000 feet, contributing to varied terrain with river valleys and significant elevation changes. This environment provides a scenic backdrop for touring cyclists seeking quiet roads.
Last updated: July 9, 2026
11.0km
00:50
280m
280m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7.27km
00:31
120m
120m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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1
riders
12.5km
00:54
220m
220m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6.30km
00:27
110m
110m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
1
riders
13.1km
00:55
240m
240m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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impressive waterfall in front of a huge cave
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From the entrance, the lava tunnel leads in two directions. The tunnel system is 2,197 meters long in total. Sturdy footwear and sufficient lighting are recommended.
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The water on the upstream side runs through an old lava tube. I'm told (but haven't seen myself) that when the water isn't too rough, you can carefully hike upstream through the tube to see two waterfalls. There's good parking for several cars just past the bridge in the direction away from Hilo (towards Pepeekeo).
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The Kawainui Stream Bridge has become a little attraction around this rainforest because some people like to jump from the bridge into the water. Warning: Jumping off the bridge can be dangerous, as the river level can change and it can become too shallow. Jumping is not recommended.
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Onomea Bay has an amazing view of rocky shores, crashing waves, and a nice viewing platform. The waters are a bit too rough to swim, especially with all the lava rocks. The jungle surrounding the shores and trail are amazing with flowers and thick vegetation.
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Rainbow (Waiānuenue) Falls is a large waterfall, measuring 80 ft (24 m) tall and almost 100 ft (30 m) in diameter. It is free to enter and see the falls because this area is part of the Hawai'i State Parks. There is no fee to see the falls. Rainbow Falls gets its name from the rainbows that show around the falls, created by the mist from the falls and the sunshine at 10:00 a.m.
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Kaumana Cave is a lava tube that is free to enter. It was made by an 1881 lava flow from Mauna Loa volcano. The lava tube has been measured at just over two miles long, which ranks it as the 57th longest lava tube in the world. There is a warning sign at the entrance that indicates: "no lights, no walkways, sharp and loose rocks". Visitors should heed the warning and bring good shoes and a light.
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There are 4 dedicated no-traffic touring cycling routes available in Hilo Forest Reserve, offering a range of experiences from easy to moderate difficulty.
The routes in Hilo Forest Reserve traverse lush tropical rainforests, with a mix of gentle slopes and some elevation changes. You'll find paths winding through dense canopies of native ʻōhiʻa and koa trees, often alongside streams. The region's significant rainfall contributes to a verdant, sometimes damp, environment.
Yes, there are easy routes suitable for families. For instance, the Old Onomea Road via Mamalahoa Highway loop is an easy 7.3 km ride, and the Onomea Bay via Pāpaʻikou route is a similarly easy 6.3 km option, both offering pleasant, traffic-free experiences.
Many routes offer stunning natural sights. The ʻAkaka Falls via Honomū route brings you close to the impressive Akaka Falls. Another popular option, the Rainbow Falls via Kaumana Caves loop, allows you to experience both the famous Rainbow Falls and the unique geological formations of Kaumana Caves. You might also encounter coastal views, especially along sections of the Old Mamalahoa Highway.
Hilo Forest Reserve experiences significant rainfall year-round, contributing to its lush environment. However, the drier months from April to October generally offer more consistent weather for cycling. Always be prepared for rain showers, regardless of the season, and check local forecasts before you head out.
Yes, several routes are designed as loops. The Old Onomea Road via Mamalahoa Highway loop and the Rainbow Falls via Kaumana Caves loop are excellent examples, allowing you to start and finish at the same point without retracing your path.
The routes primarily consist of paved or well-maintained unpaved surfaces, suitable for touring bicycles. While some sections might be smooth, others could have older pavement or compacted gravel, reflecting the natural and historic character of the area. The region's rainfall means surfaces can sometimes be damp or have mossy patches.
Public transport options directly to specific trailheads within the Hilo Forest Reserve are limited. It is generally recommended to use personal vehicles or local taxi services to reach starting points. Parking information is usually available at popular access points.
Generally, no specific permits are required for recreational touring cycling on established public routes within Hilo Forest Reserve. However, it's always advisable to check the latest regulations from the Hawaii Department of Land and Natural Resources for any updates, especially if you plan to venture into less-trafficked or protected areas. You can find more information on the official website: dlnr.hawaii.gov.
The area is highly rated by the komoot community, with an average score of 4.0 stars. Reviewers often praise the immersive experience of cycling through the lush, quiet rainforests, the stunning views of waterfalls, and the sense of solitude offered by the no-traffic routes. The unique blend of volcanic geology and abundant plant life also receives high marks.
While the routes themselves are primarily natural and secluded, you can find amenities in nearby towns such as Hilo or Honomū. It's recommended to plan your stops for food, water, and restrooms before or after your ride, or at designated points in these small communities.


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