I know you are very busy, but it is not acceptable to provide inaccurate information to interested users.
So, please make a correction:
Track length - 3,5 km
Source, at 8:10 - https://www.tf1.fr/tf1/auto-moto/videos/mclaren-senna-objectif-chrono.html
Also all Mortefontaine laptimes should be corrected to "standing start".
And please delete the picture, my tries to measure the length of the track were incorrect.