15th Annual Rock CF Rivers Half Marathon & 5K

THE ROCK CF RIVERS HALF MARATHON IS BACK!

Join us as we Outrun Cystic Fibrosis!
 
Sunday, March 22, 2026

Rock CF is hitting the island for the 15th Annual Rivers Half Marathon, 5K Run/Walk & NEW 15K! 

Rock CF is a community, thousands strong, changing the face of what living with cystic fibrosis looks like and giving those living with CF the tools to not only survive, but thrive. 100% of all proceeds support the mission of the Rock CF Foundation.

Caps for 2026
Half Marathon Cap = 800

15K Cap = 300

5K Run/Walk Cap = 500

 

HALF MARATHON 

Start Time: 8:00am

Start Location: Grosse Ile Middle School - 23270 E River Rd, Grosse Ile Township, MI 48138

Finish Location Grosse Ile Middle School - 23270 E River Rd, Grosse Ile Township, MI 48138

_________________________________________________________________________________________________________________________

15K 

Start Time: 8:00am

Start Location: Grosse Ile Middle School 

Finish Location: Grosse Ile Airport Area

________________________________________________________________________________________________________________________

5K RUN/WALK

Start Time: 8:15 am

Start Location:  Grosse Ile Airport (South of Naval Hangar)

Finish Location: Grosse Ile Middle School

_________________________________________________________________________________________________________________________

VIRTUAL RUN

We will be sending out packets the week of the race so that you can participate with us from wherever you are! Whether that be a walk around the block or a full half marathon, we can't wait to see what you accomplish. Be sure to tag us on our socials @LetsRockCF so we can share your journey and runs!

 

 

 

Below is a detailed map of the airport area & shuttle parking!

 2026 Rock CF Rivers Half Marathon, 15K & 5K Parking Info

 

There is NO public parking available at Grosse Ile Middle School. This year, there will also be NO parking available at Grosse Ile High School due to an existing event on race day.

 

Utilize the below parking options and plan ahead for your race day logistics!

If you are running the Half Marathon/15K, we HIGHLY suggest you plan to be parked 90mins before your race start time for ample shuttle and pre-race accommodations.

If you are running the 5K, we HIGHLY suggest you utilize the Airport Shuttle lots as these are directly across from your starting location/race-day packet pickup and require no shuttle prior to your race (shuttles will take you back here post-race!).

1) Township Shuttle Lots by Grosse Ile Airport (Use the address 9801 Intrepid & enter off of Meridian Rd.)

• Pre race shuttles to the Middle School begin at 6:00am and run up until race time

• Buses will drive Half Marathon & 15K runners to the Middle School for the Packet Pick Up & Start Line

• Bus loading is on Saratoga Ave

• Buses will drive Half Marathon & 5K runners back to the lots from the Middle School after the race

• The 15K Finish Line is at the airport, runners can be shuttled to the Middle School after you finish. Post race 15K shuttle pick up is here.

• We strongly encourage runners to arrive to these lots early, especially if you need to pick up your packet. Please allow plenty of time to park, and wait for bus loading. Shuttle time from the lots to the Middle School is 8-10 minutes but it will take longer.

2) Macomb Street (Walking distance to Middle School)
Select business on Macomb Street are allowing us to use their parking lots for race day parking

• Please only park in the lots that have a Rock CF Race Parking sign in front of it: Fifth Third Bank, Building Blocks, Nate’s, Public Service Credit Union, Tails, Ralph’s Lawn, Island Goods (old lot), & lot at 7738 Macomb Parking Lot

• These lots are on Macomb between Parke Lane & E. River

• If you park on Macomb, expect an approx. .5-.75 mile walk to the Middle School if you walk from Macomb through the High School path

All participants will receive a race medal with their respective distance (including virtual!) as well as a race shirt. Here are some shots of this year's Rock CF Rivers Half Marathon race shirt and medal! 🤘 

 

Don't miss out on your chance to join us for a lap around beautiful Grosse Ile on the Detroit River! We are expecting the race to sell out for the 4th consecutive year. Register today: https://runsignup.com/Race/Register/?raceId=169581

 

 

 

Schedule of Events for Rock CF Rivers Half Marathon Race Week!

Packet Pick Up

Wednesday, March 18 & Thursday, March 19- RUNdetroit (1948 Division Ste. 105, Detroit, MI 48207)
10:00 am - 6:30 pm 

Saturday, March 21- Grosse Ile MIDDLE School Gym  (23270 E. River Rd
Expo/Packet Pick Up for All Distances: 12:00 pm - 6:00 pm

 

Race Day - Sunday, March 22 

Half Marathon & 15K

Start/Finish/Pick Up is located in Grosse Ile MIDDLE School gym

6:00 am - 7:50 am | Half Marathon & 15K Packet Pick Up

6:00 am | VIP Area Opens

6:00 am | Shuttles start between shuttle parking lots & middle school

8:00 am | Half Marathon & 15K Start

11:30 am | Finish Line closes

11:45am | Last Shuttles to shuttle parking lots

15K Finishes at the Grosse Ile Airport

5K Run/Walk

Start Line is located inside of Grosse Ile Airport Naval Air Hangar

Packet Pick Up is located at Grosse Ile Pilot House - 9645 Groh Rd. Grosse Ile, MI

6:00 am – 8:00 am | Packet Pick Up/Registration at Grosse Ile Pilot House

8:15 am | 5K Start

5K Finishes at Grosse Ile Middle School

 

5K Run/Walk: Long Sleeve Tech Shirt

Half Marathon: Long Sleeve Tech Shirt

15K: T-Shirt

Virtual Run: Long Sleeve Tech Shirt