Chicago Lakefront Ultras

OCT
31
2026
Semiannual ultramarathons held along Chicago's lakefront at Northside Foster Avenue and Southside Jackson Park. Events include 50 mile, 50K, half marathon and a 20.7 mile buildup run with aid stations, drop bags and finisher awards.
Sat 31 Oct 2026
50 miles 50 kilometers 21 miles Half Marathon

Always double-check with the organizer's website! This page may contain affiliate links.

Chicago Lakefront Ultras

Chicago Lakefront Ultras organizes ultramarathon races semiannually in spring and fall along Chicago's lakefront. The series uses two racecourse locations: a Northside course near the Foster Avenue Beach House and a Southside course at Jackson Park near the 63rd Street Beachhouse. Start and finish areas are east of Lake Shore Drive at the listed addresses in Chicago.

Distances offered include:

  • 50 Mile (fall season)
  • 50 Kilometer (spring and fall seasons)
  • Half Marathon (spring season)
  • 20.7-Mile buildup run (spring season)

Packet pickup and runner check-in occur onsite only at the start/finish area. An official race shirt is guaranteed for participants who register at least ten days before race day. Aid stations are staffed by volunteers and stocked with water, energy drinks, soda, and a variety of food items. A drop bag area is available at the start/finish for personal hydration, nutrition, and clothing. Runners are encouraged to carry personal bottles or a hydration vest to reduce single-use cup waste. Awards include crystal awards for top overall male and female finishers in several distances, finishers' medals and buckles for specified events, and decade-based pint-glass awards for age group winners. Pre-race notification is requested for attempts at official USA Track and Field records. Race dates are tentative and subject to permit approval by the Chicago Park District. Visit the organization's website for the most recent information.

50 mi
50 Mile
50 km
50 Kilometer
21 mi
20.7-Mile Buildup Run
Half Marathon
Half Marathon
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.