The 70.3 Ohio Run Course: Flat, Fast and Under the July Sun

The Layout

Two out-and-back loops totaling roughly 13.1-13.2 miles through historic downtown Sandusky, starting from the Paper District Marina. Elevation gain is negligible: about 101-130 ft total, so 30-45 meters over 21.1 km. On paper it's a PR half. In practice it's mid-July in Ohio: average highs of 27°C, blazing sun, and very high heat indices in past editions. In 2024 the temperature was around 23°C, already enough to slow down anyone who went out too hard.

One detail that comes up in race reports: the course is a bit of a maze between the out and back legs, with twists and turns through downtown. Study the map before race day. Knowing where you are and how far to the turnaround buys you minutes of mental clarity.

Heat Is Enemy Number One

On a course this flat there are no climbs to hide a fade behind. The fade comes from the heat, and it builds gradually: first your heart rate creeps up at the same pace, then your pace slips. Two things to do in the weeks before:

• Heat acclimation: add runs during the hot hours of the day in the 2-3 weeks prior, if your local climate allows it.
• Rehearse your cooling routine in training—the one you'll use on race day. Don't improvise it on July 18.

Aid Stations and Cooling: Use Every Single One

Aid stations come every mile, so roughly every 1.6 km: a high frequency you should exploit systematically. The routine proven in race reports is simple: ice and water on your body at every aid station, without skipping a single one in the early miles when you still feel fresh. Ice in your cap (white, not dark), water on your head and neck, electrolytes to drink. On course you'll find PH 1000 in cups: if you've never tried it, test it in training or carry your own.

The Sandusky crowd is part of the plan: along the course there are spectators with sprinklers and water guns. Don't be a stoic—run right through them. Every degree cooler on your skin is seconds per kilometer gained on the second loop.

Pacing: Negative Split, No Exceptions

The flat course and first-loop crowd energy tempt you to go out hard. It's the classic mistake at this race: the heat punishes anyone who overcooks the first 10 km. The right plan is a deliberate negative split:

1. First loop: 5-10 seconds per km slower than your goal pace. It should feel easy. 2. Kilometers 11-16: goal pace, monitoring how you feel and your heart rate. 3. Last 5 km: if you've managed it right, here you take back everything you "lost" at the start, passing those who went out guns blazing.

The two-loop format helps: on the second pass you already know every corner, every aid station, every sun-exposed stretch. Use the first loop to map where the shade is and where the sprinklers are.

The Test to Do Before Race Day

In the final 4-6 weeks, schedule at least one brick with a 40-50 minute run at race pace during the hot hours, rehearsing the full strategy: water on your body, simulated ice, electrolytes every 10 minutes. If your goal pace holds up in those conditions, it's realistic. If it falls apart, dial the goal back by 5-10 seconds per km: on this half, the finish time goes to whoever slows down the least, not whoever starts the fastest.