Bas Cuvier
6A – 7A+ · 5 routes · sandstone · Font
- Approach 6 min — flat sandy fire road from the Carrefour de la Croix du Grand Maître car park; the blocs start 120 m in
- Best season Late September to early December and March to mid-May. Summer is humid and the friction drops sharply after 11:00.
- Published
- Updated
Bas Cuvier is the most visited boulder area in the forest and the best single place to understand what Fontainebleau sandstone actually feels like: rounded, friction-dependent, and completely unforgiving about footwork. The white and blue circuits cover almost every bloc within ten minutes of the road.
What the climbing is like
Almost everything here is either a sloped arete, a rounded mantle, or a slab that depends on rubber and trust. Pure pulling power counts for less than body position. The rock is Bleau sandstone — fine-grained, slightly porous, and friction that changes dramatically between a dry October morning and a humid July afternoon.
The classics sit between 5+ and 7A+ in Font grades, which makes the area unusually good for a first trip. You can spend a full day on the white circuit and never need more than a single pad and a brush.
Circuits and how to use them
Bleau problems are numbered and painted with a colour that indicates difficulty and, informally, the seriousness of the landings. White and yellow are the entry level, orange and blue the mid range, red and black the hard end. Follow the paint marks from problem to problem — the circuits are designed as loops that start and finish near the parking.
Because the circuit numbers are painted on the rock, the easiest way to navigate is to photograph the circuit topo board at the car park before you leave. Mobile signal inside the forest is patchy.
Conditions and etiquette
The forest is wettest from November to February. Sandstone loses a large fraction of its strength when damp, and climbing on wet Bleau rock snaps holds. The local rule is simple: if the holds look dark, walk away and come back in two days.
Chalk stays on the rock only for the length of a session — brush it off before you leave. Pads go under the problem, not in the middle of the path. Dogs stay on leads between March and June.
Routes · 5
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Hold types sloper · slab · mantle
Open beta
The forest's most repeated line. Stand start on two sloped dishes, walk your feet up the ramp on the left, then commit to a rounded mantle with nothing positive for the right hand.
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Hold types slab · friction · smear
Open beta
Sustained friction slab on the eastern face. The trick is to keep your weight over the ball of the foot and never let the heel drop; the top-out is easier than it looks from the ground.
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Hold types jug · roof · toe-hook
Open beta
Friendly roof on big holds, ideal as a warm-up for the harder roofs nearby. Use a toe hook on the right to keep the swing under control.
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Hold types arete · sidepull · heel-hook
Open beta
A leaning arete climbed on its left side. Get the heel on early, keep the hips into the wall, and do not reach for the top until your right foot is above the lip.
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Hold types crimp · pocket · roof
Open beta
Short roof into a vertical face. The crux is the first move out of the roof: a left-hand two-finger pocket used as a gaston while the feet cut loose.
Crag ethics
Crag ethics
No chipping, no wire brushing, no tick marks left behind. Bleau sandstone is protected as a national forest and the paint marks are maintained by volunteers from the regional climbing federation.
