Boullay-les-Troux Climb – Beauséjour Lake loop from Saint-Rémy-lès-Chevreuse
Boullay-les-Troux Climb – Beauséjour Lake loop from Saint-Rémy-lès-Chevreuse
4.6
(10)
43
runners
Boullay-les-Troux Climb – Beauséjour Lake loop from Saint-Rémy-lès-Chevreuse
00:50
7.79km
110m
Running
Hard run. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is accessible with public transport.
Last updated: March 24, 2026
Tips
Includes a segment that may be dangerous
A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.
After 973 m for 29 m
Waypoints
Start point
Bus stop
Get Directions
2.17 km
A dungeon in the middle of the woods?
Highlight • Monument
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2.52 km
Forest Pathway in Parc Naturel Régional de la Haute Vallée de Chevreuse
Highlight • Forest
2.73 km
Boullay-les-Troux Climb
Highlight • Climb
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Tip by
4.69 km
Old Montabé Railway Line
Highlight (Segment) • Trail
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6.27 km
Saint-Rémy-lès-Chevreuse RER station
Highlight • Other
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6.88 km
Beauséjour Lake
Highlight • Lake
15th century: Construction as a water supply reserve for a mill
1930: Breakup
1930s: Reconstruction
1990: Diagnosis
1993: Rehabilitation of the banks (with a drop in …
Translated by Google •
Tip by
7.79 km
End point
Bus stop
Way Types & Surfaces
Way Types
4.66 km
1.34 km
1.19 km
395 m
202 m
Surfaces
3.97 km
2.00 km
759 m
515 m
264 m
230 m
< 100 m
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Elevation
Highest point (140 m)
Lowest point (80 m)
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Weather
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Thursday 21 May
27°C
11°C
0 %
Additional weather tips
Max wind speed: 10.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.