The Discovery Tour is free with daily admission fee. The Boyce Thompson Arboretum is Arizona’s first and oldest botanical garden. The facility is open, and masks are required at all times. All tours and programs require pre-registration. Guests can explore the gardens and trails without reservations. Programs include a general tour, bird walks, geology and history walks, yoga classes and more! Check the Events section of their website for this month’s programs and hours. The Arboretum is located just west of Superior on Highway 60.