The conditions remain extreme: last nights (Feb 10-11) temperatures dropped to a mere -50°C (-58°F) on the trail (you can basically forget the weather reports which do not resemble trail conditions). 430mi-runner and study participant Hanno Heiss has reached the Carmacks-checkpoint as first of all race-categories and distances at 06:22 a.m. along with mountain-biker Enrico Ghidoni. They completed the 179 miles in 68 hours which is equal to the very high speed of 63 miles per day (101 km per day)! After some hot cocoa the study-measurements were commenced.

Dr. Steinach checking the trail-map.

Dr. Steinach checking the trail-map.

Hanno has reached Carmacks after completing 179 miles in 68 hours.

Hanno has reached Carmacks after completing 179 miles in 68 hours.

Solid-frozen foot-gear.

Solid-frozen foot-gear.

The current roster.

The current roster.

Hanno and Enrico celebrate their accomplishment of reaching Carmacks-checkpoint this fast.

Hanno and Enrico celebrate their accomplishment of reaching Carmacks-checkpoint this fast.

Sleep-measurements underway.

Sleep-measurements underway.