Keahua Forestry Arboretum

Keahua Arboretum

Keahua Arboretum is the kind of place most tourists drive right past. Inland from Kapa'a, up a winding road with no signage worth mentioning, this free park is where locals go to swim, picnic, and escape the beach crowds.

What's Here

The Civilian Conservation Corps planted these tropical trees in the 1930s. Monkeypod, eucalyptus, and exotic mango trees now tower over the grounds. The canopy is thick and the air is noticeably cooler than the coast.

A stream runs through the arboretum with several swimming holes. Locals love this spot on hot days. The water is fresh and cold. Two short trails (about 15 minutes each) loop through the park. Picnic pavilions are scattered throughout.

Trailhead Access

The Kuilau Ridge Trail starts here. It is a moderate 2.1-mile hike with mountain and valley views. The Powerline Trail also begins nearby, connecting Kauai's east side to the north shore (though the full trail is a serious all-day commitment). On clear days, you might catch a glimpse of Mt. Wai'ale'ale from the arboretum.

Know Before You Go

The access road gets muddy after rain. 4WD is strongly recommended, especially in the final stretch. The arboretum itself can be muddy too, so wear shoes you don't mind getting dirty.

From Highway 56 in Wailua, cross the Wailua River Bridge and turn inland (mauka) onto Kuamo'o Road (Highway 580). The arboretum is about 5 miles up the road. Free entry, no facilities beyond the picnic pavilions. Bring your own water and food.