The Trailbreaker
Race Day Weather
Cool start, steady breeze
Runners will face a starting temperature of 36°F, rising to 44°F by the end. Wind will come from the NW at 13 mph, with gusts up to 24 mph. With humidity at 69%, it's advisable for runners to dress in layers and monitor their hydration closely.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for The Trailbreaker
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Trailbreaker is Waukesha's home grown running event and has been held annually since 1993. This Waukesha tradition initially consisted of a Marathon, Half-Marathon, and 5K Run/Walk. Both Marathon courses are certified by the USATF and may provide qualifying credentials for other races. We are excited to once again offer a 10K event at the Trailbreaker. The Trailbreaker originally was the brainchild of three running colleagues (amigos). Since 2009, the Park Foundation of Waukesha, Inc. (PFW Inc.), has organized and hosted this annual event as a fundraiser for the enhancement of city parks, trails, recreation programs and the urban forest.