The runner rounded the corner and entered the home stretch.

Literal

Runner [topic-は] corner [object-を] turned home-stretch [to-へ] entered.

ホームストレッチ ('home stretch') is a direct English loanword from track and field. コーナーを回る ('to round a corner') is the standard expression. The sentence reads like a sports broadcast — present-tense narration of past action giving it immediacy.