Aiea Loop Trail

The ʻAiea Loop Trail begins and ends in Keaīwa Heiau State Recreation Area, at the end of ʻAiea Heights Drive. The trailhead is off the park road at the upper east end of the park, near parking, picnic pavilions and a restroom, and the loop comes out at the lower campgrounds, where you follow the park road back to your car. The trail runs along the ridge on the west side of Hālawa Valley, with views from Pearl Harbor and the Waiʻanae Range to Honolulu and Diamond Head. Native koa and ʻōhiʻa grow near Puʻu ʻUaʻu, the high point partway around, lemon eucalyptus scents the air, and Norfolk Island pines mark the lower end, in a forest foresters largely replanted. Hikers may also see the remains of a bomber that crashed here. DLNR rates it easy to moderate: it is not strenuous, but there are gradual climbs, a steep switchback, a stream crossing at the end, and it may be muddy, with sections of exposed roots. Bring water, wear good walking shoes, be ready for light passing showers, and stay on the trail instead of side trails and shortcuts. Mountain biking is no longer allowed, and dogs are not allowed in the park, though leashed dogs may pass through it to reach the trail.