ʻAiea Loop Trail
Hawaii hikers

**IMPORTANT PARK NOTICES**

Monitor local surf and weather reports before your park

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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.

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[OʻAHU] - UPDATE 3/18/25: Mauna ʻAla, Royal Mausoleum State Monument will be undergoing improvements that may temporarily prevent vehicular access. Please check the Royal Mausoleum State Monument website for updates.

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[OʻAHU] UPDATED 3/18/25 – Diamond Head State Monument (DHSM): Full Park Closures will occur Tuesdays through Fridays beginning April 1 to April 11 and also Monday through Thursday April 14 to April 17.  Partial Park Closures Hours with operating hours from 6:00 AM to 2:00 PM will occur on Monday April 7 during this time, and will resume from April 21 onwards Monday through Friday, (except weekends and holidays).   Normal Park Hours from 6:00 AM to 6:00 PM will resume during Spring Break March 17 to March 28, Good Friday Holiday on April 18, and Weekends. During Partial Park Closures Hours from 6:00 AM to 2:00 PM, the last reservation time slot for Parking and Entry and Entry Only will be 12:00 p.m. If you reserved at 12:00 p.m., you must enter the Park no later than 12:30 p.m. or you will be denied entry. The project began January 6, 2025, and will run to July 25, 2025, or upon completion of the rock fall mitigation construction project at the Kahala Tunnel. Please check back for updates.

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[MAUI] UPDATE 3/4/25 - Polipoli Spring State Recreation Area: Beginning April 1, 2025 through April 30, 2025 the park, cabin campgrounds and access road to Polipoli Forest Reserve will be closed due to tree mitigation work. 

ʻAiea Loop Trail

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.