Approximately 2,600 athletes will be descending on Madison over the weekend to compete in the 2014 Ironman triathlon.
The triathlon routes feature Madison and its surrounding scenic areas, organizers said.
Ironman Wisconsin offers a $25,000 professional prize and 50 age-group qualifying slots for the 2015 Ironman, according to a release.
The triathlon starts at 7 a.m. on Sunday with a 2.4-mile swim in Lake Monona, followed by a 112-mile bike ride through rural Dane County and a 26.2-mile run through downtown Madison.
According to the release, 17 countries and 48 states will be represented in the triathlon, with 818 participants coming from Wisconsin.
Many University of Wisconsin campus and downtown streets will be closed to accommodate the biking and running portion of the race, organizers said.