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Dane County Highway and Transportation

Upcoming Special Events on Dane County Trunk Highways

Ironman Wisconsin 70.3 - 9/6/2025

Between the hours of 7:30 a.m. and 2:00 p.m. approximately 1,700 people will be participating in the Ironman Wisconsin 70.3 bicycling event. Please use caution when traveling on the following Dane County Trunk Highways in the affected municipalities or find an alternate route.  We appreciate your cooperation in making this a safe and successful event for everyone.

  • CTH A, from Piller to CTH D  (TOregon, TMontrose)
  • CTH A, from Glenway to CTH D (TOregon)
  • CTH B, from Lalor to Sand Hill (TDunn)
  • CTH CC at Alpine (VOregon)
  • CTH D, from CTH A to Judd (TOregon)
  • CTH D at Whalen (CFitchburg)
  • CTH D, from CTH A to Remy (TMontrose, TOregon)
  • CTH M, from Borchert to Fitchburg Rd (CFitchburg)
  • CTH MM, from Irish to Rimrock (CFitchburg, CMadison)
Ironman Wisconsin - 9/7/2025

Between the hours of 7:45 a.m. and 5:30 p.m. approximately 1,700 people will be participating in the Ironman Wisconsin bicycling event. Please use caution when traveling on the following Dane County Trunk Highways in the affected municipalities or find an alternate route.  We appreciate your cooperation in making this a safe and successful event for everyone.

  • CTH D at Whalen (CFitchburg)
  • CTH G, from Marshview to Messerschmidt (TVerona, TSpringdale)
  • CTH J, from Witte to Garfoot (TCross Plains)
  • CTH KP, from Garfoot to Bourbon (VCross Plains, TCross Plains)
  • CTH MM, from Rimrock to Irish (CFitchburg, CMadison)
  • CTH P, from Bourbon to Stagecoach (TCross Plains)
  • CTH PD, from Shady Oak to Northern Lights (TVerona, CVerona)
  • CTH S at Timber (TCross Plains)
  • CTH S, from STH 78 to Witte (TSpringdale, TBlue Mounds)

 

During these events, please use caution when traveling on Dane County Trunk Highways in the affected municipalities or find an alternate route. We appreciate your cooperation in ensuring a safe and successful event for everyone.