Your Trail Runner is actually a 29-footer, not a 25-footer.
We have a Trail Runner 22RK (rear kitchen), and when we were first looking at it my wife thought it was a 22-foot trailer (because of the model number) . . .
But I kept telling her it was longer and bigger than our old 24-foot trailer (1978 Coachman Cadet 24) . . .
Our Heartland Trail Runner 22RK is actually a 28-foot trailer . . . which means that the model number of an RV no longer really depicts what the length of a trailer actually is.
Like it used to be . . .
By the by . . . welcome to the Heartland family!