Rock CF Rivers Half Marathon
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Event overview
The 15th Annual Rock CF Rivers Half Marathon & 5K takes place in Grosse Ile, Michigan on Sunday, March 22, 2026. The event is organized by the Rock CF Foundation and lists that 100% of all proceeds support the foundation. Distances offered for 2026 include a new 15K in addition to a half marathon, a 5K run/walk, and a virtual run. The foundation reports it has donated more than 2,000 pairs of running shoes and race entries to people living with cystic fibrosis since 2014.
Distances and entry details
- Half Marathon - Price: $85. Cap: 800.
- 15K (new) - Price: $70. Cap: 300.
- 5K Run/Walk - Price: $40. Cap: 500.
- Virtual Run - Price: $50.
Race weekend and fundraising
A race expo is scheduled for Saturday, March 21 at Grosse Ile Middle School. Race activities on Sunday use Grosse Ile Middle School and the Grosse Ile Naval Hangar as event locations. Fundraisers who raise $500 or more receive VIP benefits that include VIP parking, access for four to a VIP area, a personalized stake sign, private gear check, private restrooms, and coffee and snacks. Visit the organization's website for the most recent information.
