The Kalalau Trail in Hawaii has been temporarily closed due to a norovirus outbreak that has sickened around 50 hikers since early September. The Hawaii Department of Health (DOH) confirmed the closure on September 4, and while no new cases have been reported since September 4, the trail will remain partially open to Hanakāpīʻai for day use starting September 21. The DOH is conducting a survey among individuals who held park permits during the outbreak period to gather more information. Deep cleaning and sanitation efforts are ongoing, with signs being installed to inform visitors about hygiene practices. Notably, water testing revealed fecal contamination in a nearby cave, prompting its closure. The full reopening of the trail will depend on the resolution of health and safety concerns.