Kystleden Halvmaraton Horten-Tønsberg is a trail-surface half marathon in Vestfold, Norway, run from the Horten side toward Tønsberg. The race starts at 13:00 by Linden Senter, with the start line placed 80 meters south of the Bastø ferry ticket office.
Tønsberg Triathlonklubb organizes the race. The name indicates a coastal route between two towns, not a city-loop half marathon. The race listing only provides this distance, so the half marathon is the focus.