Half Marathon & Relay

Start Time: 8:00 am 

Start Location: Grosse Ile Middle School (23270 E. River Rd. Grosse Ile, MI 48138)

5K Run/Walk

 Start Time: 8:15 am

Start Location: Inside of Naval Station Hangar

(9601 Groh Rd.) Across from Township Shuttle Parking Lots

All races FINISH at Grosse Ile MIDDLE SCHOOL


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Saturday, March 16 th

Running Fit- Northville

17783 Old Haggerty Road

Northville, MI 48168

Time- 10:00am- 3:00 p.m.

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Wednesday, March 20th

Thursday, March 21st

Location- RUNDetroit

441 W. Canfield, Detroit, MI

Time- 10:00 a.m.- 7:00 p.m.

Parking Info- Metered parking on Canfield, Cass Avenue & Second Avenue

Saturday, March 23rd


Location- Grosse Ile Middle School Gym (23270 E. River Rd)

Time- 12:00 p.m. to 6:00  p.m.



Half Marathon & Relay

Location: Grosse Ile Middle School

Time-  6:00 a.m.- 7:45 a.m.

5K RUN/Walk

Location- GI Pilot House (9645 Groh Rd, Grosse Ile)

Time- 6:00 a.m. -8:00 a.m.

NO CARS WILL BE ALLOWED TO ENTER THE MIDDLE SCHOOL PARKING LOT ON RACE DAY! If you are picking up your packet on race morning you must either park at the High School and walk over, or ride the shuttle from the lots at the airport (9801 Groh Rd).

There will be no drop offs or pick-ups allowed. 

2 Person Relay Info Leg 1- 7.7 Miles/Leg 2- 5.4 Miles

  • Leg 1 will start with the Half Marathon at 8 am from Middle School

  • 2 Yellow school buses will take all 2nd leg runners to the relay transition area at 8:05am. These two busses only make one trip, so you MUST get on one of them if you are running the 2nd leg!

  • Relay Transition at Grosse Ile Water Treatment plant on West River

  • Vans will run from transition area continuously and return 1st leg runners to the Middle School


Half Marathon- Drop & Pick Up Inside of the GI Middle School Gym

5K- Drop: UHaul Van outside of Grosse Ile Pilot House Pick-Up: Same Haul Van at finish line

RELAY Gear Check
Leg 1- Drop in TEAL bags in Middle School Gym at RELAY GEAR CHECK Table/Pick Up in Transition Area
Leg 2- Drop in RED bags in Transition Area/Pick Up in Middle School Gym  at RELAY GEAR CHECK Table

*Half Marathon Course Info: There will be a 3 hour and 30 minute time limit for the half marathon. This breaks down to a 16 minute per mile pace. If you wish to continue beyond the limit, you will be on your own with no support provided by the race.

Special Note: Grosse Ile is an island connected by two bridges. The north end bridge costs $2 to enter. The south end bridge is Free. Please note that because of trains and possible bridge openings your travel time could be delayed. Please plan to arrive on the island early to make sure you have ample time to prepare.




Plug the address 9801 Intrepid Grosse Ile, MI 48138  into your GPS and park in the township parking lots (look for the signs!). Once parked walk across Groh Road to the Pilot House to pick up you race packet or register if you haven't registered yet.

 If you have your packet you can head to the Naval Air Hangar right next to the Pilot House!



Parking/Shuttle Lot Location- Plug the address 9801 Intrepid Grosse Ile, MI 48138  into your GPS and park in the township parking lots (look for the signs!).

  • Get on one of the yellow school buses to the Middle School!  

  • Shuttles start at 6:00 a.m. This is for the Half, Relay & Spectators!

  • Buses will shuttle runners back to the parking lots from the middle school after you finish!


Grosse Ile High School Parking Lot (Very limited parking)- Walk path behind the High School to GI Middle School for half marathon & relay packet pick-up/registration & start line. If you are doing the 5K you must board the shuttles to airport for 5K race and 5K packet pick-up/registration! 

***NO  Cars will  be allowed to enter the Middle School lot before, during or after the race.***

All runners and spectators must park in our shuttle lots and be dropped/pick up at the Middle School, or  park at the High School and walk over via the path behind the school.


Awards will be inside of Grosse Ile Middle School. Look for signs & awards table!


Holiday Inn Express in Woodhaven- (6 Miles to Race site) - 21500 West Road, Woodhaven, MI 48183, (734) 362-0933

Grosse Ile Pilot House - 9645 Groh Road, Grosse Ile, MI 48138, 734-671-2295
www.gipilothouse.com (Right next to 5K Start. Across from shuttles to Middle School)

Bishop’s Cottage Bed & Breakfast - 7573 Macomb, Grosse Ile, MI 4813, (734) 671-9191 (Walkable to start/finish)


Bishop Brighton Bed & Breakfast - 2709 Biddle Avenue, Wyandotte, MI 48192, (734) 284-7309

 *Course Alteration for 2018: Runners will be using the bike path parallel to Groh Rd. upon exiting the Airport grounds until they reach E. River Rd.

*Course Alteration for 2018: Runners will be using the bike path parallel to Groh Rd. upon exiting the Airport grounds until they reach E. River Rd.

Spectator Info

Our course is incredible for spectators. Thanks to an abundance of cross road that hit the course, you can catch your runner all over the island!

Spectator Do's and Dont's for Race Day

- Ride the shuttles from the airport to the Middle School, park at the High School, or park on Macomb St and walk to the Middle School via the path behind the High School
- Drive on and park on roads that intersect the course and walk down to the race course to see your runners!
- Be patient
- Cheer and have FUN!
- Come inside of the Middle School to stay warm and buy some Rock CF Gear!


- Drive on ANY part of the race course during the race

- Try to drive to the Middle School at any point on race day (NO runner or spectator cars will be allowed access to the MS)

- Park on residents lawns