Sur le Thier

Aywaille, Belgium

The Sur le Thier is a col with a length of 698 meter. This is a category 4 col. It is located in Aywaille, Wallonie, Belgium. The average grade of this col is 12.7% with a maximum of 22%. The Sur le Thier ascents from 154 meter at the start, to 242 meter at the top, with a total of 89 ascending meters.


Sur le Thier Profile


Distance 698 m
Elevation gain 89 m
Average grade 12.7 %
Maximum grade 22 %
Climb category 4
Minimum elevation 154 m
Maximum elevation 242 m

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The steepest road in Belgium.