The ʻAiea Loop Trail Rode Out Three Storms. Fall Brings an Earlier Gate.

After Lala, Lowell and Nolo, the Division of State Parks' October notice lists Kaʻena Point as the Oʻahu park still dealing with storm repairs. Keaīwa Heiau State Recreation Area isn't on that list.

ʻAiea's ridge trail did close once this year. The trail itself wasn't the reason. Hawaiian Electric needed the park cleared while it replaced a transmission structure. Since then, the main thing that has changed about a walk up here is the time on the gate.

One Closure, and It Was About a Power Line

Here is how the season played out on the hill above ʻAiea, in order.

1. Aug. 14 to 17. The National Weather Service's event summary for Lala, which classifies it as a Category 1 hurricane, lists that event period. Local news coverage called it Tropical Storm Lala. Rainbands brought heavy rain to Oʻahu from late Aug. 15 through Aug. 16, with considerable flooding. The agency's impact narratives record roof damage in ʻAiea, along with downed trees and power lines in Honolulu County.
2. Week of Aug. 23. The Honolulu Star-Advertiser reported that Keaīwa and the ʻAiea Loop Trail would stay closed until that Friday while Hawaiian Electric crews replaced a transmission structure Lala had damaged. A helicopter would help with the work, weather permitting.
3. Friday, Aug. 28. Hawaii News Now reported that the repair was finished and the park and trail would reopen that day. Its crew saw downed trees throughout the park, and safety signs were up at the entrance.
4. Sept. 5 to 10. Hurricane Lowell made its closest approach on the night of Sept. 7, passing west of Niʻihau. Oʻahu had a flash-flood event before that approach.
5. Sept. 25 to Oct. 3. Nolo's gusty winds caused roof damage on Oʻahu on Sept. 25 and 26. It then brought heavy rain over the island from Sept. 30 into Oct. 1.

After both of the later storms, the state's park notices still did not list Keaīwa as closed. Kauaʻi had a much harder time. As of Oct. 19, state parks there were still reopening in stages, and Kōkeʻe Road remained closed until further notice.

So for anyone who hikes here, the closure that counted was a single week of utility work. A walk up the ridge this fall starts from a trail that reopened in late August and has stayed open since.

The Gate Now Closes an Hour Earlier

The change most likely to catch a regular is the clock. Keaīwa runs on two schedules. Summer hours are 7 a.m. to 7:45 p.m. and start April 1. Winter hours are 7 a.m. to 6:45 p.m. and start the day after Labor Day. So winter hours have been in place since early September, and entry is still free.

The math matters for an after-work loop. The Division of State Parks puts the ʻAiea Loop Trail at 4.8 miles and suggests allowing about 2.5 to 3 hours. At that pace, a loop started much after 3:45 p.m. can run past the 6:45 p.m. closing. A summer start time that worked easily before Labor Day now ends at a locked gate.

What the Rain Leaves on the Ground

The state's own trail description says to expect mud and exposed tree roots. The loop isn't strenuous, but it has gradual climbs, and the hardest part comes last, with a steep switchback and a stream crossing at the end. After the soaking Nolo brought in late September and early October, those last stretches are the place to slow down.

The downed trees Hawaii News Now saw in August were in the park itself, inside a forest planted by hand. Foresters replanted much of this area in the late 1920s. The groves of Norfolk Island pine and eucalyptus that make Keaīwa feel like a forest above Pearl Harbor date from that work.

The most practical step happens at the car. The Division of State Parks asks hikers to help slow Rapid ʻŌhiʻa Death, the fungal disease killing Hawaiʻi's most abundant native tree, with a short routine:

• Brush soil off shoes and gear, then spray them with 70 percent rubbing alcohol, before and after a hike.
• Wash hiking clothes in hot, soapy water.
• Don't move ʻōhiʻa wood or plant parts, and avoid injuring the trees.
• If muddy roads got onto the car, clean the tires and undercarriage with a high-pressure hose.

That routine matters more on this trail than on most, because the ʻōhiʻa are part of the walk.

The Loop, Marker by Marker

From the park entrance to the high point and back, the state's park page notes these landmarks along the way:

• Keaīwa Heiau, at the park entry. This is a heiau hoʻōla, or healing temple. A kahuna diagnosed and treated illness here and trained haumāna in lāʻau lapaʻau, healing with plants, fasting and prayer. One account dates it to the 16th century and Kakuhihewa, an aliʻi of Oʻahu, with his kahuna Keaīwa. Its stacked rock wall, about four feet high, encloses an area of 100 by 160 feet.
• Norfolk Island pines at the lower end of the trail, plus lemon eucalyptus that gives the air a light citrus smell.
• Koa and ʻōhiʻa near Puʻu ʻUau, the high point about halfway around the loop.
• Remnants of a B-24 bomber that crashed in 1944.
• Views along the ridge on the west side of Hālawa Valley, from Puʻuloa and the Waiʻanae Range to Honolulu and Lēʻahi.

The state's page translates the name Keaīwa as mysterious or incomprehensible, perhaps because no one could explain the healers' powers. The heiau is a sacred site. It's the first thing visitors pass and deserves the most respect.

Two park rules are easy to forget. Dogs aren't allowed in the park, but a leashed dog may cross it to reach the ʻAiea Loop Trail. Also, the park page still lists its 10 tent campsites as temporarily closed, because of construction that a December notice said would last through February 2026. Anyone planning an overnight should check the reservation system before counting on a site. The picnic areas along the paved road are a different matter. Some have covered pavilions with barbecue grills and restrooms nearby.

Down the Hill, the Bay Park Has Its Own Work Underway

The storm season left ʻAiea's ridge open, but it isn't the only state park with recent news. Down at the shoreline, construction at ʻAiea Bay State Recreation Area began Oct. 5 and was expected to take about two weeks. Restrooms stay open during the work, but parking is limited. The Pearl Harbor Bike Path runs through that park. As of Oct. 19, the state's notice still described the work in future tense and hadn't confirmed it was finished. Anyone planning to park there for the bike path should check the park notices page first.

After the Loop

The drive down Aiea Heights Drive leads straight to food.

• Totoya Hawaiʻi opened its third Oʻahu location at Aiea Shopping Center, 99-115 Aiea Heights Drive, Suite 250, on Feb. 15, according to Aloha State Daily. Its seafood rice bowls are the closest meal to the trailhead.
• The Pearlridge Open-Air Farmers' Market runs Saturdays from 8 a.m. to noon in the Wai Makai street-level parking lot along Kamehameha Highway. If you start at 7 a.m. when the gate opens, a 2.5-to-3-hour loop gets you there well before it closes.
• Pearlridge's Village Market takes over the same Wai Makai lot on Saturdays from 5 to 9 p.m. With winter hours, a hike that ends at the 6:45 p.m. gate still leaves time for dinner there.
• UBAE, the ube dessert shop, had already opened at Pearlridge Center, 98-1005 Moanalua Road, when Aloha State Daily covered it in June. The Pearlridge shop has items you won't find at its other location, including ube slushies and an "ubaegato."

If you'd like to know how the hill above Pearlridge, from Aiea Heights to Hālawa, fits the way you live, The Agency Oahu is happy to talk it through over coffee after your next loop. Contact Us.