Outdoor Cycling

Hey Mimarigastelum,

We're glad you're asking Apple Support Communities about your Apple Watch not measuring the distance for your workout. If you haven't already, restart both your iPhone and your Apple Watch as restarts can resolve many issues:

Restart your iPhone

How to restart your Apple Watch

You'll also want to complete the steps in the following guides to ensure you're getting the best readings:

Get the most accurate measurements using your Apple Watch

Calibrating your Apple Watch for improved Workout and Activity accuracy

Keep us posted on the results.

Take care.