The best walks and hikes in ʻOlaʻA Forest Reserve

The ʻOlaʻa Forest Reserve is a humid tropical rainforest on the slopes of Mauna Loa. The landscape is defined by volcanic features, including historic lava flows. The forest canopy is dominated by native ʻōhiʻa and koa trees, with a dense, prehistoric-feeling understory of hāpuʻu tree ferns.

Yes, the area offers several easier options. While many trails explore rugged volcanic terrain, there are 33 easy-rated hikes in and around the reserve. A great choice for an accessible but spectacular experience is the Kīlauea Iki Crater Loop, which takes you through lush rainforest and across a solidified lava lake.

The reserve is a prime destination for birdwatchers as it's a critical habitat for many native Hawaiian birds. The forest is home to endemic honeycreepers like the 'apapane, 'amakihi, and 'i'iwi. The unique kīpuka—islands of old forest surrounded by lava—are particularly rich in birdlife.

A kīpuka is a Hawaiian term for an area of land and older forest that was spared by surrounding lava flows. Hiking in this region, you can experience the dramatic contrast of walking from a barren, black lava field directly into one of these lush, green 'islands' of life. They are ecological treasures and refuges for native plants and animals. You can learn more about them on the National Park Service website.

Generally, public access trails like the Puʻu ʻŌʻō Trail do not require a permit for hiking. However, if you plan to explore specific features like the lava tube along the trail, a permit may be required from the State Department of Land and Natural Resources (DLNR). It's always best to check the latest regulations before your visit.

The primary access for many popular hikes, including the Puʻu ʻŌʻō Trail, is located along Saddle Road (Highway 200). The trailhead is situated between the 22 and 23-mile markers. Be aware that some trailheads, like the one for the ‘Ōla‘A Forest Reserve Trail on Old Volcano Road, are reported to be overgrown and may be difficult to navigate.

The weather on the slopes of Mauna Loa can change very rapidly. Fog is common and can roll in unexpectedly, reducing visibility. Rain is also frequent. You should always hike with layers of clothing, reliable rain gear, and a map and compass or GPS device. Due to hunting in the area, wearing bright clothing is also recommended for safety.

Yes, for those seeking a longer and more strenuous day out, there are several challenging options. The Kīlauea Iki West Overlook – Kīlauea Iki Crater Trail loop is a 9.5-mile (15.3 km) route that provides a significant workout with substantial elevation gain, combining several of the area's distinct landscapes.

The trails in and around the ʻOlaʻa Forest Reserve are very highly rated by the komoot community, with an average score of 4.7 stars. Hikers often praise the unique experience of walking through native rainforests, across volcanic craters, and along the dramatic caldera rims.

There are nearly 60 designated hiking routes in and around the ʻOlaʻa Forest Reserve. These range from easy walks through the forest to challenging full-day treks across volcanic landscapes, offering a wide variety of options for all skill levels.

The areas are adjacent and share a similar volcanic landscape, with some trails crossing between them. ʻOlaʻa is a State Forest Reserve focused on conservation and recreation, while Hawaiʻi Volcanoes is a National Park with more visitor infrastructure. A trail like the Crater Rim Trail is within the National Park but showcases the type of terrain—caldera edges and steam vents—that defines the entire region.

Some trails have deep historical roots. The Puʻu ʻŌʻō Trail, for example, follows the path of a historic 19th-century cattle driving route. Hiking it allows you to walk through history, crossing lava flows from the 1855 and 1881 eruptions of Mauna Loa.