2016 The Chain of Rocks Bridge Duathlon 4/24/16

Sunday, April 24th

About: Entering its fifth year, the Chain of Rocks Bridge is now the permanent home of our Spring Duathlon. Due to the construction on the Arch Grounds and in Laclede's Landing we have re-located our event to a longer bridge and a more rural bicycle course.  Bridge and park is the perfect venue to ease into an active event season. Set on the iconic Chain of Rocks Bridge, the race starts and finishes on Chouteau Island. Participants will run from Illinois to Missouri and back, followed by a flat, fast out and back bike circuit, returning to a final out and back run leg across the bridge with great views of the mighty Mississippi.

Race Information: Download our Athlete Guide  for the nitty gritty details.


  • Pre-event Online. Deadline for a GuaranTEEd Shirt is April 17th.
  • At Big Shark WEST 11am - 5pm Saturday, April 23rd
  • RACE DAY at the Chain of Rocks Bridge Parking Lot on the Illinois side of the Bridge. From 7:30am until 8:30am.

RACE DAY- arrive EARLY- we start and park at the Eastern/Illinois entry to the Chain of Rocks Bridge! RACE will go on rain or shine. We've cast our vote for shine.

Distances: 1.5 mile run – 12 mile bike – 1.5 mile run. A great distance for the beginner or seasoned veteran.

The Venue: The Chain of Rocks Bridge – and rural roads on the Illinois side of the Mississippi River.

Race Date: Sunday April 24th at 9:00 AM

Chain of Rocks Bridge Duathlon Registration Details-

Before January 1st, 2016 Individual $55/Team $75
January 1st through March 1st Individual $60/Team $80
March 1st through April 23th Individual $65/Team $85
Race Day April 24th Individual $70/Team $90


Athletes registered after April 17th, 2016 are not guaranteed an Event Shirt

Team Entry: You can have two person teams- with one person doing the run legs and the other doing the bike segment OR a three person team in which one person does the first run leg, a second person completes the bike leg and the third person completes the final run.

ALL participants wear a timing strap on their non-drive side ankle facing outward. Teams will pass the strap from one to another to time each leg of the race. All straps must be returned or participants will be charged $100 fee.

Packet Pick-Up:

  • Saturday, April 23rd, Big Shark Bicycle Company WEST, 17233 Chesterfield Airport Rd, 63005- 11am-5pm.
  • Sunday, April 24th; Chain of Rocks Bridge IL side at 7:30am - 8:30am 

Chain of Rocks Bridge Training Group- Interested in doing a Duathlon? Want to join an awesome group with awesome benefits to prepare? Check out the Big Shark/Nutriformance Duathlon Bridge Training Group.

2016 Registration is Open:



Run 1 Details: 1.5 miles – Start on the Illinois Entry to the Chain of Rocks Bridge- head West. Before getting to Missouri, turnaround and Head East on the Bridge. 

Run to Bike Transition in the Chain of Rocks Bridge Parking Lot! Transition area will have water and first aid support.

Bike Details: 12 miles  – East on Chain of Rocks Road. South on Slough Road/Chouteau Place Road to turn-around.

Bike to Run Transition in the Parking Lot at the East Entry/Chain of Rocks Road! Transition area will have water and first aid support.

Run 2 Details: 1.5 miles – Start on the Illinois Entry to the Chain of Rocks Bridge- head West. Before getting to Missouri, turnaround and Head East on the Bridge. High Fives!

Awards: Top 3 Overall Men and Women.

  • Top 3 Age Groups Men/Women: U19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-65, 65-69, 70+
  • Team: Top Men, Women and Coed Teams

Celebrate!Take in the spectacular view of the Mighty Mississippi River from the Chain of Rocks Bridge deck. Awards will be at (approx.) 11 am in the parking lot at the foot of the Bridge on the Illinois side.

Post-Race Therapy: We are proud to have the Precision Health Group as a sponsor of this event. The Precision Health Group thinks differently and treats differently and is indeed a different kind of results-based chiropractic organization. Set up an appoinment with them to work out the post race kinks.

Race Results:

Questions, Comments, Compliments or to volunteer – mike@bigshark.com

Learn more about the Chain of Rocks Bridge:


 Thanks to R & R Sanitation for supplying our "facilities".



Run Course

Bike Course