About This Route
The Chasm Walk is a short, 20-minute loop trail just 5km from Milford Sound's entrance in Fiordland National Park, perfect for beginner birdwatchers seeking kea and other alpine species. Follow the boardwalk through beech forest to The Chasm viewpoint where the Cleddau River thunders through potholes carved by glaciers. Kea often perch nearby, cracking into packs with their beaks; South Island robins and fantails flit about. DOC notes this as prime kea spotting; arrive early morning or late afternoon for activity. Combine with nearby Humboldt Falls for more birds like bellbirds. The route's accessibility makes it ideal for families, but crowds peak in summer.
Safety Considerations
Boardwalks prevent slips, but side paths to river edges are hazardous; stay on designated trails per DOC rules. Kea are notorious thieves; secure zips with carabiners, stash shiny items, and never leave gear unattended as they chew rubber seals per real incidents. Rain makes surfaces mossy; wear grippy shoes. Sandflies less intense here but present; long sleeves essential. Overhead branches drop in wind; check Fiordland weather app. Observe birds from distance: kea approach curiously, but crowding stresses them. Follow Leave No Trace: pack out rubbish, as bins overflow. Avalanches rare but possible in heavy snow; avoid winter. Bridge vibrations from water powerful; hold rails with kids.
Essential Gear
Nikon Monarch binoculars, Bushnell spotting scope, Merrell Moab shoes, Patagonia Capilene shirt for insect protection, Sea to Summit dry bag for snacks. Bug net hat, compact first aid with tweezers for splinters.