In 2021, when I cycled from Moosch to the Grand Ballon,
the road surface of part of this climb
(between Geishouse and the Col du Haag) was horrible.
Two years later, this "road" was replaced by a fabulous cycle path,
forbidden for motorized traffic.
Since that cycle path is also quite steep in parts,
it is great for real climbers.
The first five kilometers of the ride, until Geishouse,
are not steep (mostly 7%).
However, after turning sharply right at the top of this village,
the road becomes steeper.
Soon you cycle onto the bicycle path.
First there are two kilometers with an average gradient of 8.9%.
The next 2.5 kilometers have a steep middle section
with easy sections at their beginning and end.
The last one ends in a hairpin bend to the left,
after which the hardest passage begins
(1.6 kilometers with an average of 11.1%).
This passage includes a 250-metre stretch of 14%
shortly before its end and then finishes at the Col du Haag,
where the cycle path reaches the Route des Crêtes.
Another 1400 metres (7-9%) must then be covered
on the Route des Crêtes, until the highest point of this road
not far from the Grand Ballon.