I think that it's not a tail feather. The shape suggests that it is actually primary wing feather.
The uneven, almost ragged trailing edge is typical of an owl. That uneven edge is what breaks the air flow so as to give owls virtually soundless flight.
The pattern is similar to the Great Horned Owl and the Barred Owl.
The Length is a bit long for a Barred Owl but still possible.
The length is spot on for a Great Horned Owl.
The colour pattern is the clincher for me. The light areas on Barred Owl primaries (and secondaries) tend to be nearly white while corresponding areas on Gr. Horned feathers are a warm, tawny brown, like your feather.
It looks like a Great Horned Owl Primary feather to me.