What it is
The Harold L. Lyon Arboretum, a research unit of the University of Hawaiʻi at Mānoa, is a 194-acre tropical rainforest botanical garden located in the upper reaches of Mānoa Valley, just five miles from Waikīkī. Established in 1918 by the Hawaiian Sugar Planters' Association, its initial purpose was watershed restoration and testing various tree species. Today, it serves as a living laboratory for conservation biology, horticulture, and ethnobotany, boasting over 6,000 species of tropical and subtropical plants, including a significant collection of native Hawaiian and culturally important flora. The arboretum features over seven miles of hiking trails that wind through its lush and biodiverse landscape.
Visitor experience
Visitors to Lyon Arboretum can explore an extensive network of diverse tropical rainforest trails and themed gardens, including the Native Hawaiian Garden, Bromeliad Garden, Beatrice H. Krauss Ethnobotanical Garden, and various memorial gardens. The trails offer opportunities to admire exotic and native plants, observe tropical birds, and learn about the cultural significance of various flora. A highlight for many is the ʻAihualama Falls, located at the end of an easy out-and-back trail within the arboretum.
The arboretum provides a tranquil and immersive nature experience away from the urban bustle, making it an ideal choice for nature lovers, botanists, and those interested in Hawaiian culture and conservation. It fits well as a half-day activity for individuals or families seeking a peaceful outdoor escape, an educational outing, or a complement to the nearby Mānoa Falls hike.
Logistics
- Area and Access: Lyon Arboretum is situated at the very end of Mānoa Road in Mānoa Valley, approximately a 15-minute drive from downtown Honolulu.
- Public Transportation: TheBus route 5 (Ala Moana – Mānoa) terminates near the arboretum, followed by an approximate 15-minute walk.
- Operating Hours: The arboretum is open Monday through Friday, from 9:00 AM to 3:00 PM. It is closed on weekends and all state and federal holidays. Visitors should check the official website for potential last-minute closures due to ongoing construction or other updates.
- Admission: Entry to Lyon Arboretum is free, though a donation of $10 per person is suggested and appreciated to support its programs and upkeep.
- Reservations: As of recent updates, reservations are generally not required for individual visitors or parking. However, conditions can change, so it's advisable to verify the current policy on the arboretum's official website before visiting. Organized groups of 8 or more participants (including schools and tour groups) are required to make prior arrangements with the Education Department.
- Parking: Free parking is available on a first-come, first-served basis, but spaces are limited. Parking is strictly reserved for arboretum visitors only; vehicles belonging to those heading solely to the Mānoa Falls Trail will be towed. If the arboretum's lot is full, a paid parking lot is available at the former Paradise Park, located before Lyon Arboretum. When approaching, inform the parking attendant that you are visiting Lyon Arboretum for free parking access.
- Likely Duration: A typical visit can range from 1 to 3 hours, depending on how many trails and gardens a visitor wishes to explore. It is best considered a half-day activity.
- Activity Type: This is primarily a self-guided experience, though educational workshops and specific group tours are offered through their education department.
Safety and cautions
- Tropical Environment: The arboretum is located in a tropical rainforest ecosystem, receiving significant rainfall (around 13 feet annually). Visitors should be prepared for hot, humid, and potentially wet conditions.
- Trails: Trails can be narrow, uneven, muddy, and very slippery, especially after rain. Closed-toed shoes with good traction are essential. Some sections may be steep and covered with roots. Not all trails are wheelchair-accessible.
- Insects: Mosquitoes are prevalent and can be aggressive. Insect repellent is strongly recommended.
- Weather Preparedness: Bring a hat, sunscreen, and a rain poncho or jacket to prepare for varying weather.
- Water Safety: Avoid entering streams or ponds, particularly if you have open cuts, as leptospirosis and other harmful bacteria may be present. Do not drink stream water.
- General Policies: Stay on designated pathways and heed all posted signs and warnings. Be aware of falling branches. The arboretum prohibits collecting plants, soil, rocks, or animals without prior approval. Pets, with the exception of service animals, are not permitted. Smoking and vaping are also prohibited on the grounds.
- Beyond Aihualama Falls: While the ʻAihualama Falls Trail is generally easy, continuing past the falls is not recommended due to confusing and poorly marked trails, which could lead to visitors becoming lost.
Editorial take
Lyon Arboretum is a must-visit for travelers seeking a deep immersion in Hawaiʻi's tropical botany and natural beauty. It offers a unique opportunity to explore a living rainforest and learn about conservation and ethnobotany in a serene, academic setting. It's particularly ideal for nature enthusiasts, hikers, and those looking for a peaceful, uncrowded alternative to more commercial attractions. The free admission and suggested donation make it a budget-friendly option.
Travelers who might skip it include those with significant mobility challenges, as many trails are not wheelchair accessible and can be slippery. Those averse to insects or muddy conditions, or individuals primarily interested in beaches, luxury shopping, or urban entertainment, may find it less appealing.
It's important not to confuse Lyon Arboretum with the former Paradise Park, a separate theme park that was once adjacent. While Lyon Arboretum is near the popular Mānoa Falls Trail, it operates independently with its own parking guidelines; visitors solely headed to Mānoa Falls should use the designated Mānoa Falls parking area to avoid issues.
Source notes
- Harold L. Lyon Arboretum - University of Hawaii at Manoa: https://manoa.hawaii.edu/lyon
- Harold L. Lyon Arboretum | A University of Hawaii Research Unit: https://manoa.hawaii.edu/lyon/
- Lyon Arboretum: How to Visit, What to See, & FAQ - Hawaii Break: https://www.hawaiibreak.com/lyon-arboretum-oahu/
- Safety and Policies | Harold L. Lyon Arboretum - University of Hawaii at Manoa: https://manoa.hawaii.edu/lyon/visit/safety-policies/
- Hiking the ʻAihualama Falls Trail at Lyon Arboretum on Oʻahu, Hawaiʻi: https://www.unrealhawaii.com/2023/04/aihualama-falls-trail-lyon-arboretum/
- History, Mission, and Future of Lyon Arboretum - University of Hawaii at Manoa: https://manoa.hawaii.edu/lyon/about/history-mission-and-future-of-lyon-arboretum/
