University of Chicago (UChicago)

At the University of Chicago, an institution globally recognized for its intellectual intensity, student traditions often manifest in ways that balance extreme cerebral rigor with physical fortitude. Among the most enduring of these is the Polar Bear Run which takes place at the end of Kuvia, the week-long winter festival.

Sources:

https://collegeadmissions.uchicago.edu/campus-life/traditions-events/