PlanningTravel note
Diamond Head needs a reservation
Diamond Head State Monument, Honolulu, Hawaii
Published Oct 10, 2026 · RegretMap travel note
The situation
Out-of-state visitors need to reserve an entry time for the Diamond Head summit hike in advance.
The lesson
Book a morning slot online before you go.
This travel note was written by the RegretMap team from general travel guidance. It isn't a personal account and may be out of date. Check official sources for permits, weather, safety and transport.