From big races to Saturday morning group runs—find ultra events and connect with the local endurance sports community.
Sat, Apr 11, 2026 at 6:30 AM
Since 2007 this race has encompassed a beloved local loop known as the Arb Loop. This is a 10K loop that includes the beautiful landscape of the UW- Madison Arboretum. Once again MadCity will host the 100K solo, 50K Solo, along with the 100K Relay, and 50K Relay. 2026 will be the home of the 100K National Championships.
50k 100k Run Ultra
Madison, Wisconsin, 53715, United StatesShowing 5 of 7 organizations. View all organizations
USA Swimming Club. 556 members.
Swim
Contact: jakeupjohnson@yahoo.com
201 S Gammon Rd, Madison, Wisconsin, 53717-1404, United StatesUSA Swimming Club. Club Excellence: Silver. 272 members.
Swim
Contact: janiskatz@gmail.com
4602 Eastpark Blvd, Madison, Wisconsin, 53718-2002, United StatesUSA Swimming Club. Club Excellence: Bronze. Safe Sport Recognized. 177 members.
Swim
Contact: mcfarland.spartan.sharks@gmail.com
325 W Olin Ave, Madison, Wisconsin, 53715-2188, United StatesTriathlon
Contact: teambbmc@gmail.com
4822 Holiday Drive, Madison, Wisconsin, 53711, United StatesUSA Swimming Club. 125 members.
Swim
Contact: greg.lake@waunakeewave.org
5000 N Sherman Ave, Madison, Wisconsin, 53704, United States