Kosci100

Kosci100

The organiser gives 105.6 km and 2,973 m of climbing (the course description rounds it to 107 km). After a small loop from Perisher, the course follows the Snowies Alpine Walk along the ridge above the Thredbo Valley to Charlotte Pass and the summit of Mt Kosciuszko, then the Main Range Walking Track toward Guthega. It comes back past Smiggin Holes to Perisher, takes the Perisher to Bullocks track down to Bullocks Flat, climbs the valley to Thredbo and finishes after a loop of the Thredbo ski area.

The cutoff pace is 15:39 per kilometre; the organiser expects the first finisher around 6:00 pm on Friday and the last by noon on Saturday. Pacers are not allowed, crews may help only within 500 m of a supported checkpoint, and the Eagles Nest waterpoint can be reached by crews on the Kosciuszko Express Chairlift. Runners must be 18 on race day. Finishers earn three running stones.

This page covers the 2026 Kosci100. The summit and the Main Range are where a phone is most likely to go quiet. On a Livebib broadcast, the position is then carried forward along the course and marked as estimated, so the people waiting in Thredbo still see roughly where the runner is, with distance covered and a finish estimate that updates as the race goes. It opens in a browser, no account or app, and the runner decides who gets the link.