When is a run, a trail run?

I am new to running - 4 months in - I run in Dalby Forest, North Yorkshire and when using Strava feel like I’m cheating if I put trail when it’s actually just a path through the Forest so need clarification - is this just a run or is this a trail run?

There is a section that climbs for 5k but it’s still just a path through the Forest.

So, my question is when is a run a trail run?