The best cycling routes around Mauna Kea

Touring cycling around Mauna Kea involves highly varied terrain. You'll encounter paved roads at lower elevations, but as you ascend, routes often include challenging gravel and sand sections, especially past the visitor center and closer to the summit. The gradients can be extreme, with some sections reaching up to 16%. The landscape transitions from lush rainforests to volcanic lava flows and an alpine stone desert, requiring a suitable bike, such as a gravel or mountain bike, for the unpaved segments.

While Mauna Kea is known for its challenging climbs, there are easier touring cycling options available. For instance, the Old Onomea Road via Mamalahoa Highway loop is a 4.5-mile trail through lush 'green tunnels' with minimal elevation gain. Another easy option is the Mamalahoa Highway to Mamane Street loop, a 3.6-mile ride with jungle scenery. These routes offer a gentler introduction to cycling in the region.

For experienced touring cyclists seeking a significant challenge, the ascent to the summit of Mauna Kea is renowned. The Mauna Kea summit from Puʻu Huluhulu route is a 29.9-mile journey with over 7,155 feet of elevation gain, traversing multiple climate zones. Another demanding option is the Mauna Loa Observatory from Puʻu Huluhulu — Hawai‘i, a 35.6-mile path through volcanic landscapes with substantial climbing.

Mauna Kea offers a wealth of natural features and landmarks. You can explore dramatic volcanic terrain with lava flows and cinder cones, and experience diverse climate zones from rainforests to alpine deserts. Notable attractions include the Mauna Kea summit itself, home to astronomical observatories, and Lake Waiʻau, the highest lake in the Pacific Basin. For stunning views, consider visiting Pu‘ukalepeamoa Lookout.

Yes, there are beautiful waterfalls you can reach by touring bike. The ʻAkaka Falls via Honomū route leads you towards the impressive Akaka Falls and Akaka Falls State Park. Another route, Kawaiku'i Beach Park loop via Umauma Falls, offers views of Umauma Falls.

Cycling Mauna Kea involves significant altitude changes, with oxygen levels decreasing by 42% at the summit compared to sea level. Acclimatization is crucial for high-altitude rides. Weather conditions can vary dramatically, transitioning from warm, humid rainforests at sea level to cold, windy, arctic-like conditions near the peak. It's essential to be prepared for rapid weather shifts and bring appropriate layers, sun protection, and plenty of water.

Yes, there are several circular touring cycling routes. The Old Onomea Road via Mamalahoa Highway loop and the Mamalahoa Highway to Mamane Street loop are both excellent options for a scenic loop ride. For a longer, more challenging loop, consider the Kawaiku'i Beach Park loop via Umauma Falls.

For families looking for gentler rides, the lower elevation routes are ideal. The Old Onomea Road via Mamalahoa Highway loop, with its lush 'green tunnels' and minimal elevation, is a great choice. Similarly, the Mamalahoa Highway to Mamane Street loop offers a pleasant ride through jungle scenery. These routes are shorter and less strenuous, making them suitable for a family outing.

Despite the harsh conditions at higher elevations, Mauna Kea supports unique endemic species. You might spot the rare Mauna Kea Silversword, a plant that flowers only once in its long life, or the Wekiu bug, a flightless insect adapted to high altitudes. The *māmane* tree defines the alpine tree line up to about 9,500 feet. The rapid transition through climate zones means you'll see a wide variety of plant life as you ascend or descend.

There are over 10 touring cycling routes available around Mauna Kea, catering to various skill levels. This includes 3 easy routes, 3 moderate routes, and 8 difficult routes, offering diverse experiences from scenic coastal loops to challenging high-altitude climbs.

The touring cycling routes around Mauna Kea are highly rated by the komoot community, with an average score of 4.75 stars from over 5 reviews. Cyclists often praise the dramatic volcanic vistas, the unique experience of traversing multiple climate zones, and the immense sense of accomplishment from tackling the challenging ascents.

Amenities become sparse as you ascend Mauna Kea. At lower elevations, you may find small towns or communities with cafes and shops. However, closer to the summit, facilities are limited. The Mauna Kea Visitor Information Station offers facilities and stargazing programs, but it's crucial to carry sufficient food, water, and supplies for the majority of your ride, especially on longer, more remote routes.