The Birky Challenge Memorial Ride for the Fallen is a bicycle ride to honor the service and sacrifice of fallen Fond du Lac Officer Craig Birkholz (badge #67) and all Wisconsin fallen officers who died in the line of duty. There are 3 routes to choose from: 20, 40 and 67 miles. All routes start and finish at Holy Family Community Church in Fond du Lac. All routes are on paved roadways (no off-road riding). A portion of the proceeds benefit local charities and 2 law enforcement charities; the Police Unity Tour and Law Enforcement United.