[jerlam]

The ability to create segments and compare them across rides is probably the easy part. The hard parts that Strava has already solved are:

1. Segment creation - over the decade+ that Strava has existed, people have eventually created enough segments to cover most riding areas. Most people won't be interested enough to create segments - Garmin has had segments for years and I don't see a single segment created on any of my runs, nor am I willing to create segments myself. So the feature is unused.

You can attempt to create segments yourself across all users by leveraging another source of data (like how Strava is using pre-defined Zwift routes instead of allowing user-input segments) or some programmatic way.

2. Global leaderboards - Strava is primarily a social media site, so all rides and runs are public. This means leaderboards are heavily populated. Having a KOM or PR in Strava is somewhat meaningful; but on a platform with few users, the KOM or PR is not. I don't know how you would address this without a lot of user data.

[switchbak]

For MTB, trail forks is far and away the leading source of quality trail (segment?) Data.

They do some ride recording, but maybe getting bought by Outside and integrating with trail forks would be an exit move here.