Hamarkarusellen Vinter Løp 4 is the fourth event in a six-event winter running series in Hamar, Norway. The start and finish are at Prestrudhallen. It is a 5 km road race conducted in winter, typically in cold January conditions with snow and temperatures often below freezing. All races and classes commence at 18:00, making this an evening run.
The winter series utilizes the same control-measured 5 km course for each event, differing from the summer Hamarkarusellen. The route follows illuminated walking and cycling paths in the Prestrud area, serving as a repeatable test run throughout the season. Participants can join with or without timing. The field is intended for company groups, casual exercisers, individuals racing themselves or a neighbor, and competitive runners. Rankings are based on gun time, with chip time also displayed in the results.