Riders navigate the course during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Vanessa Curtis of Iowa City (center) and Brianna Samuhel of Australia (right) make their way along a grass farm lane during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Vanessa Curtis of Iowa City (left) and Brianna Samuhel of Australia (right) make their way along a grass farm lane during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Mason Wilson of Kalona rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

ulien Gagné of Quebec rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Riders rejoin the road after riding in a grass strip on the edge of a field to avoid the mud during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Lachlan Morton rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Michael Lambert of Platteville, Wisc. rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Nate Kullbom of Iowa City leads a group of riders through the grass on the side of a road to avoid the mud during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Nate Kullbom of Iowa City rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Peter Frolichs of Girona, Spain uses grass and sticks on the side of the road to clear mud from his bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Whitney Allison of Fort Collins, Colo. rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Crystal Anthony of Bentonville Ark. rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Sarah Sturm of Durango, Colo. rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Geerike Schreurs of the Netherlands rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Rosa Maria Klöser of Germany rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Morgan Aguirre of Girona, Spain rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Nicolien Luijsterburg rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Emily Joy Newsom rides during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Riders make their way into a grass strip in between the road and a field to avoid heavy mud during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Mud and grass cakes a riders wheel during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Conrad Shannon stops to loan another rider a tounge depressor to clear mud during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Simen Nordahl Svendsen of Norway walks his bike through the grass before withdrawing due to a mechanical failure during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. Nordahl, who won the 2024 Gravel Earth Series that core4 is a part of, said that the muddy level b roads that dominated the day are unique to American Gravel Racing and noted that Iowa was much less flat than he expected. (Nick Rohlman/The Gazette)

Julien Gagné of Quebec (right) carries his bike up Osage St. SW during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Daxton Mock of Lake Mills, Wisconsin carries his bike up a muddy level b section of Osage St. SW during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Adam Roberge of Quebec carries his bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Riders carry their bikes up Osage St. SW during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Lachlan Morton runs with his bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Rosa Maria Klöser runs with her bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Morgan Aguirre carries her bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Sarah Sturm of Durango, Colo. carries her bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Hugo Drechou of France carries his bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Julien Gagné of Quebec carries his bike during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Mad cakes a riders bike as they make their way up Osage St SW during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Nate Kullbom of Iowa City takes a drink as he walks wup Osage St. SW during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Heavy mud from rain the night before the race caked the wheels and tires of riders bikes and made navigating some sections of the course impossible except on foot during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Rosa Maria Klöser sprints to the victory during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

Rosa Maria Klöser sits on the ground after sprinting for the win during the core4 multi surface bike race in Johnson County, Iowa on Saturday, August 16, 2025. The race ran on an alternate route due to heavy rain the night before on a day where the heat index rose to more than 100 degrees. The men’s elite race was won by Julien Gagné of Quebec and the women’s elite race was won by Rosa Maria Klöser of Germany. (Nick Rohlman/The Gazette)

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