Narrow-trail harvesting (Pienuratekniikka) is a thinning method where the first thinning is done along narrow trails, without permanent strip roads. The full growing area keeps producing.

When no permanent strip roads are opened at first thinning, the full growing area keeps producing. Second-thinning yield and total rotation-period output rise.

With compact forest machines, strip-road spacing and width are chosen per stand: dense narrow trails, ghost trails at 20–30 metre spacing, or fully trail-less felling.