11 ultra events in Lake County, Illinois

We look forward to seeing you at the starting line on May 16, 2026!

The Run for D103 5K Run/Walk is a family-friendly, annual fundraising event that enables the Parent-Teacher Organization (PTO) to provide the Lincolnshire-Prairie View School District 103 with programs and equipment for the benefit of our children. This race is representative of our district's commitment to foster both healthy minds and healthy bodies in our children and to instill a lifelong passion for education and exercise.

In addition to the 5k, we will host the Sibling Shuffle, a free fun run for children ages 4 and under. Toddlers will have a chance to toe the line and be just like their older sibling(s) in this 103-yard dash to the finish line. Each participant will receive a participation medal to celebrate his/her achievement.

Since the Run for D103 is a family event, we kindly ask you to please leave all furry friends at home. Registered service dogs are always welcome.

Please note we CANNOT GUARANTEE T-SHIRTS for registrants after April 15, 2026. After that date shirts will be distributed on a first come, first served basis based on inventory and registration date/time.

Join the Memorial 5K Foundation to honor our nation and remember the service and sacrifice of those who have died in the line of duty. Participate in the 5th Annual Memorial 5K Run/Walk on Sunday, May 24, 2026.

Our area veterans and active-duty service members will conduct a brief ceremony of remembrance followed by the running of our unique 5K race.

The racecourse, through the Lake Barrington Shores community, has been certified by U.S. Track and Field and will be professionally chip timed. Participants will receive a race tech shirt and beautiful finishers medal as part of their registration. Proceeds from your race registration will benefit the Memorial 5K Foundation, which supports the work of the Veterans of Lake Barrington Shores and the Tunnel 2 Towers Foundation.

Start Time: 8:00 AM. A Ceremony of Remembrance will proceed the Memorial 5K Race Start.

Where: Starting Line at Market Place Shopping Center, Corner of Kelsey Road and Route 59 in Lake Barrington, 60010. Parking available at ReMax Properties Northwest, 5041 Shoreline Road, Lake Barrington, IL 60010.

3 - Count 'em - 3 Sprint Triathlons for a low price of $225!!

Fox Lake Triathlon - June 7,

Lake Zurich Triathlon - July 12 and

Wauconda Triathlon - July 26.

Your fee includes: Lowest price possible for each race, all the swag (timing, shirt, towels, food etc), and overall tri series medal at the end of Wauconda (must compete all 3 sprint races).

How does it work:

1. Register here and pay the allotted amount and you're in.

2. USAT registration is required at the time of registration. It would benefit you to pay for a full membership (or renew) now vs. a one day license that is only good for one race.

3. Each race will send you a personal note to compete their registration, waiver, shirt size, emergency contact etc..

4. The limit for the tri series is 50 participants.

5. Entry into the Series is for the SPRINT Triathlons for each location.

6. Participants who attempt to register for all three races separately WILL NOT be eligible for the Lake County Triathlon Series.

7. Sorry we don't give out refunds. You need to commit to all three races!!

8. Registration Deadline is June 5 or when the series fills at 50 people.

9. Cumulative time is tabulated from all three events, with top female and males earning Lake County Triathlon Series OVERALL winner at the end of the Wauconda Triathlon.

10. Lake County Triathlon Series participants will be eligible for age group awards at the Fox Lake, Lake Zurich, and Wauconda triathlon.

Questions: email [email protected]

The 9th Annual USAT Sanctioned Fox Lake Sprint Triathlon

Picture yourself coming down the finish line at LakeFront Park after finishing your race. You'll have swum 750 yard triangle course in Nippersink Lake triangle course - 2 inflatable duck turns and a swan finish. Then bike the 12 mile bike route with a few rollers and some straight shots to get up some speed. Then run 3.1 miles on an out and back course with over 2 miles on a paved bike path. Picture perfect!

Individual and relays welcome!

2026 SWAG - You choose from a Hat or Visor!

Parking within 2 blocks of transition. Finish line within steps of transition. Great spectator event in and around the course.

Typically wetsuit legal, always no draft bike, and flat and fast run. USAT official will be on the bike course.

Registration will close on Thursday, June 4, 2026 - 7:30 p.m.

Time trial starts every 5 seconds

FINISH LINE food, festivities, and awards will be done near when the last person has finished.

NEW IN 2026

Three Sprint Triathlons - One Rate - All the swag - Cool Medal - Overall Winner Awards!! Fox Lake - June 7, Lake Zurich - July 12, and Wauconda Triathlon - July 26. Check out the link to get registered - LImited to 50 racers.