Rainbow Falls via Kaumana Caves loop

This route is generally considered a moderate cycling experience. While it's mostly paved and can be enjoyed by various skill levels, it does involve approximately 250 meters (820 feet) of climbing and descending, with some sections reaching an 8% grade. A good fitness level is recommended.

The loop is about 12.5 kilometers (7.7 miles) long. While the raw data suggests a quick ride, given the moderate difficulty and elevation changes, most touring cyclists should plan for 1.5 to 2.5 hours to comfortably complete the loop, allowing time for sightseeing at attractions like Rainbow Falls and Kaumana Caves.

The primary highlights are the stunning Rainbow Falls, an 80-foot waterfall cascading over a lava cave, and the unique Kaumana Caves, which are extensive lava tubes. You'll also pass through lush vegetation and may catch glimpses of the Boiling Pots upstream from Rainbow Falls.

Yes, parking is available at Rainbow Falls. This is a convenient spot to begin your cycling adventure, offering easy access to the loop.

While the loop primarily follows public roads and paths, specific rules for dogs can vary at the attractions. Rainbow Falls State Park generally allows leashed dogs in outdoor areas. For Kaumana Caves, due to the challenging and undeveloped nature of the lava tubes, it is not suitable for pets.

Hilo experiences consistent tropical weather year-round. The best time to cycle is typically during the drier months, though rain can occur at any time. Mornings are often clearer and cooler, and visiting Rainbow Falls in the morning increases your chance of seeing rainbows in the mist.

No, there are no permits or entrance fees required to cycle the Rainbow Falls via Kaumana Caves loop itself, as it utilizes public roads. Access to Rainbow Falls and Kaumana Caves is also free.

If you plan to enter Kaumana Caves, you'll need a flashlight or headlamp, as there is no artificial lighting. The floor is uneven and consists of sharp lava rock, so sturdy closed-toe shoes are essential. Be prepared for a steep metal staircase descent into the cave.

The route is primarily paved, making it suitable for touring bicycles. However, be aware that some road shoulders, particularly on Waianuenue Avenue and Akolea Road, can be narrow or even non-existent. The loop includes both ascents and descents, with a fun 'screaming descent' on the return to Hilo.

Yes, riding the loop counter-clockwise is often suggested. This direction provides more opportunities for sightseeing breaks and allows you to tackle some of the ascents on flatter sections, potentially making the climbs feel more manageable.

While the route is mostly paved, its 'moderate' difficulty, elevation changes, and sections with narrow or absent road shoulders mean it's best suited for families with older children who are experienced cyclists and have a good fitness level. It's not ideal for very young children or beginner family riders.