Policies & Accessibility

For your safety and the enjoyment of your visit, please observe the following policies and safety guidelines.


  • ALL visitors to the Arboretum must sign in at the Visitor Center.
  • All organized group tours, gatherings and private events must be booked with Lyon Arboretum prior to visiting. Unauthorized group events or tours are prohibited.
  • Parking is reserved for Arboretum visitors only. All others (including those going to the Manoa Falls trail) will be towed.
  • Official Arboretum-led tours, events and field trips have priority of the grounds. Do not obstruct or interfere with official programming or related tools and equipment.
  • Visitors are allowed during posted public hours only. Please adhere to all posted closure notices on our website or Arboretum grounds.
  • Pets – with the exception of service animals – are not allowed. Service animals must have service permits and be on a leash and in control at all times.
  • Smoking is not allowed on Arboretum grounds. Please refrain from smoking until well away from the property.
  • The taking of soil, rocks, water, animals, plants, or plant parts from the Arboretum grounds is prohibited. Collecting for research purposes must receive prior approval by Arboretum administration.
  • Amateur photographers are welcome, however all commercial photography or videography must be arranged and approved ahead of time.
  • Do not obstruct, disturb or deface the trails, plants, signage, water features, equipment, structures or facilities.
  • The introduction of outside plants, terrestrial or aquatic animals, insects, or birds is prohibited.
  • Large picnics and sports or other activities on our lawn areas are prohibited.

Safety Guidelines:

  • What to wear or bring:
    • Wear appropriate close-toed footwear with good traction.
    • Check weather conditions prior to your visit and be prepared for potential sunor rain by bringing a hat, sunscreen, and rain poncho or jacket.
    • Bring a water bottle and stay hydrated- we sell bottled water in our Gift Shop but do not have public water fountains.
    • Be prepared for mosquitoes and other insects – insect repellent is recommended.
  • Walk carefully – trails may be narrow, slippery, and uneven.
  • Avoid entering streams or ponds, especially if you have open cuts or wounds. Leptospirosis and other harmful bacteria may be present in the water or soil.
  • Do not drink stream water, or eat plants or plant parts.
  • Beware of falling branches, especially in windy weather.
  • Know your physical limitations and be aware of your surroundings.
  • Stay on the designated pathways and trails, and proceed onto unmaintained or rigorous trails only if you are an advanced hiker.
  • Pay attention to and follow all posted signs and warnings.


Parking Accessibility:
General parking at the Arboretum is limited. There is one (1) accessible parking space in each of the following areas: the Visitor’s Center parking lot, the Education Department Office, the Grounds Department Office, and the Micropropagation Laboratory. Vehicles parking in these accessible parking stalls must display an official accessible parking placard.

Building Accessibility:
Wheelchair-accessible entrances are available to the following buildings/facilities: the Visitor Center and Gift Shop, the Upper and Lower Classrooms, the Education Department Office, the Marilyn Mueller Goss Children’s Learning Center, the Grounds Department Office and the Micropropagation Laboratory.

Garden and Trail Accessibility:
Given our sloping landscape, tropical weather and extensive acreage, the majority of our trails are not wheelchair-accessible. Gardens that can be viewed from the paved sidewalks surrounding our Visitor’s Center include the Betty Ho, Stemmermann, and Young Memorial Gardens, as well as the Mapes Garden. See Our Gardens Page for more information.

Future Improvements to Accessibility:
The Arboretum hopes to develop accessible and user-friendly trails throughout the Arboretum in the near future.