ʻAiea Loop Trail
Hawaii hikers

**IMPORTANT PARK NOTICES**

Monitor weather reports before your park visit!

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[HAWAI'I] - UPDATE 6/17/25: West Hawai’i Island Parks to Close Early on 4th of July Holiday. To prevent unauthorized use of fireworks on the 4th of July, and the potential for wildfire, three west side parks will close early on that day. Park visitors must exit these dry, leeward parks by 5pm, when the gates will be locked. The parks affected include Hāpuna Beach State Recreation Area, including Waialea Beach section, Kīholo State Park Reserve, and Kekaha Kai State Park (both the Mahaiʻula and Maniniʻōwali sections). The public is reminded that fireworks are prohibited at all times, in all Hawaiʻi State Parks.

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[MOLOKA’I] - UPDATE 6/16/25: Pala’au State Park Pavilion: Due to continued renovation work, the pavilion closure has been extended from June 1 to July 31. The Pala’au Camping Area has been CLOSED from June 1 to July 31, 2025.

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[MAUI] UPDATED 6/4/25 – Kaumahina State Wayside - CLOSED June 12 to June 22 for tree removal project.

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[MAUI] UPDATED 5/23/25 – Mākena State Park - State Parks is issuing an Invitation for Bids (“IFB”) to qualified parties interested in a Mobile Food Truck Concession Agreement to operate a Mobile Food Truck (“MFT”) Concession at Mākena State Park. More information may be obtained on the following link: https://dlnr.hawaii.gov/dsp/announcements/invitation-for-bid-for-sealed-bid-proposal-to-provide-a-mobile-food-truck-concession-at-makena-state-park-on-maui/.

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[OʻAHU] UPDATED 5/21/25 – Diamond Head State Monument (DHSM): Updated June Operating Hours - The rockfall mitigation project began January 6, 2025 and will run until September 5, 2025 or upon completion of the construction project at the Kahala Tunnel. Please check the Diamond Head State Monument website for updated park operation hours during this time.

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[KAUAʻI] - UPDATE 3/21/25: Pā‘ula‘ula State Historic Site - Due to construction improvements, the park closure will begin starting March 24 until further notice.

ʻAiea Loop Trail

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    Trail Length 4.8 mile loop
    Activity Pedestrian
    Difficulty Easy to Moderate
    Terrain Forested and Open Ridge
    Elevation Gain 900 ft
    Trail Brochure Keaīwa Heiau Brochure
    Park Name Keaīwa Heiau State Recreation Area

    Description

    The ‘Aiea Loop Trail is 4.8-mile trail that begins and ends in the park. This trail runs along the ridge on the west side of Halawa Valley and offers views of the southern coastline of O‘ahu from Pearl Harbor (Pu‘uloa) and the Wai‘anae Range to Honolulu and Diamond Head (Le‘ahi).

    Much of this area was replanted by foresters in the late 1920s. The lemon eucalyptus trees give the air a light citrus fragrance. Stands of Norfolk Island pine trees mark the lower end of the trail. Look for the native koa and ohi‘a trees as you reach Pu‘u Uau, the high point about midway along the length of the trail. You might also see remnants of a B-24 bomber that crashed in 1944.

    This hike is not strenuous but involves some gradual uphill climbs with a steep switchback and a stream crossing at the end of the trail. The trail may be muddy with sections of exposed tree roots. Give yourself about 2.5 to 3 hours for the hike and enjoy the plants and the sound of birds around you.

    Route

    The trailhead is off the park road at the upper eastern end of the park marked by parking lots, picnic pavilions and restroom. Park your car in a marked stall and look for the trail sign. The trail will come out at the lower campgrounds. Follow the park road back to your car.

    Directions

    Follow H-1 to Moanalua Highway (Route 78). Take the ‘Aiea cutoff to the third traffic light, make a right turn at ‘Aiea Heights Drive and follow it about 3 miles up to the end of the road. Continue on the one-way park road to the trailhead.

    Additional Info

    • Mountain biking is no longer allowed on this trail.
    • Stay on the trail.
    • Keep dogs on leash.
    • Pack out at least what you pack in.
    • No open fires.