[Exmoor]

My first organized marathon I kept running after the finish line, through the crowd of stopped runners, until my watch hit 26.3mi just so I could be certain It'd show up as a PR in Strava/Garmin.

[iamacyborg]

Garmin rounds up so it’s not an issue there in my experience.

They also take the actual activity time if GPS has overcounted, unlike Strava.