Missing CircuitLength in some sessions

[McHouse]

Hi TheOehrly,

First of all, thank you for the amazing FastF1 library—it's a game-changer for F1 telemetry analysis.

I noticed that in some sessions, calling Sesion.get_circuit_info() does not return the circuit length (CircuitLength) or CircuitLengthKm. For example, Abu Dhabi 2025 Practice 2 seems to be missing this field.

This can cause issues when trying to calculate official track distances or derive sector start points reliably. I understand this might depend on the underlying data source, but I thought it could be useful to flag it in case there’s a way to either populate it consistently or document this limitation.

Thanks for your time and for the continuous work on FastF1!

Best regards,

[theOehrly]

I'm sorry but where did you get the idea that FastF1 ever provides a circuit length anywhere? I'm not aware of any CircuitLenght or CircuitLengthKm field. Did you read about this somewhere else? Or have I forgotten what my own package does?