Lyon Arboretum (Mānoa)

The University of Hawaiʻi's rainforest garden at the very back of Mānoa Valley. Free (suggested $10 donation), open weekdays 9 a.m. to 3 p.m., closed weekends and holidays. A trail continues up to ʻAihualama Falls.

• Address: 3860 Mānoa Road, Honolulu, past the Mānoa Falls trailhead.
• Hours: Monday to Friday, 9 a.m. to 3 p.m. Closed weekends and state and federal holidays.
• Admission: free; suggested donation $10 per person.
• Reservations aren't required right now, but construction has caused occasional closures. Check the website before going. Phone 808-988-0456.
• Expect rain, mud and mosquitoes; wear closed shoes and repellent.
• It holds spring and fall plant sales popular with local gardeners.

Source: University of Hawaiʻi: Visit Lyon Arboretum

Last checked Oct. 29, 2026. Hours, fees and rules can change, so confirm with the official source before you go.