A NORTHWOODS CHALLENGE

The Underdown Events are unique challenges on one of the largest trail systems in Wisconsin. Trail runners can choose from 10k, half marathon, marathon or 50k options on Saturday, August 24. Mountain bikers can choose from one lap (33 miles), two laps (66 miles) or three laps (100 miles) on Saturday, August 17.


UNDERDOWN

TRAIL RUN



THUNDERDOWN

MOUNTAIN BIKE RACE


LOADS OF SINGLETRACK, CHALLENGING TERRAIN

BIGGER AID STATIONS, AFTER PARTY 

JOIN US:   RUN      BIKE