Alex Knob

Alex Knob launches from 1,282 m above the Franz Josef Glacier on New Zealand's South Island, reached by a genuine hike — about 1,000 m of climbing on the well-marked Department of Conservation track to the top. The takeoff itself is an easy, clean grass area facing east, north and west, though it can be damp in the morning. What makes this site different is the airspace: Franz Josef is the busiest heliport in the Southern Hemisphere, and flying here without following strict rules is both illegal and genuinely dangerous. Every pilot needs an airband radio on the helicopter frequency, 118.6 MHz, to broadcast position and altitude before launching and every 15 minutes throughout the flight — this is a mandatory broadcast zone, not a suggestion. The realistic flying windows are the afternoon climb, the evening once helicopter traffic has stopped for the day, or an overnight camp up top for a morning launch before the helicopters start. Over the glacier itself, watch for the catabatic wind draining down the ice even when it feels calm.

Launch & conditions

Takeoff is a flat, easy grass area facing east, north and west — clean, though it can be wet in the morning. Reaching it means climbing about 1,000 m on the well-marked DoC track to the top of Alex Knob.

Getting there & local rules

Follow the New Zealand Department of Conservation track to the summit of Alex Knob — well signed, but a genuine 1,000 m climb on foot.

Local rules & hazards

This is a mandatory broadcast zone in the busiest heliport airspace in the Southern Hemisphere: every pilot must carry and use an airband radio on 118.6 MHz, broadcasting position and altitude before launch and every 15 minutes during the flight — flying without following this is both illegal and dangerous. The best windows are an afternoon climb, an evening flight once helicopter traffic has stopped, or an overnight camp for a morning launch before helicopters start. Watch for the catabatic wind draining down the glacier even in apparently calm conditions.

Check conditions before you fly

A forecast for the valley is not a forecast for the launch. Before heading to Alex Knob, read the wind and thermals for the site itself, confirm the day's rules with the local club, and remember the standing rule — when in doubt, don't launch. In the free OutDare app you can open Alex Knob with a 7-day forecast built from high-resolution weather models, see who else has been flying, and get there with offline maps.