Hi Thibaud -
Thanks for reaching out. I’m a product manager for Google Maps. We launched ski runs on Maps as an experiment years ago as part of our ongoing work to provide people with helpful information. Over time, we’ve found that most users don’t turn to Google Maps for this type of information, and that they instead prefer to use maps directly from the individual ski resorts, since they’re seen as the most authoritative source of this information. As a result, we’ve been in the process of removing this information from Maps, which you may have noticed already.
We appreciate your offer to help us add this information but it isn’t needed, as ski run details will no longer be available in Maps. We now consider this matter to be closed.