When I decided to commit to the 8.2-mile Mackinac Swim, I knew the road ahead would require grit, consistency, and a solid training plan. Open-water swimming presents challenges—current, temperature, and mental endurance—but the reward of completing such a feat outweighs every obstacle.
Recently, I had the opportunity to swim in the clear, turquoise waters of the Caribbean, where I embraced the thrill of open water. That experience fueled my determination to step up my training. As I transition to pool training, I’m increasing my mileage and focus in preparation for this iconic event.
Whether you’re a seasoned swimmer or a beginner considering this event, I’ll share my training insights and what makes the Mackinac Swim unique. And if this challenge is on your bucket list, I’ve created a week-by-week training schedule to help you get swim-ready.
What Is the Mackinac Swim?
The Mackinac Swim is an 8.2-mile adventure swimming event that spans the straits between Michigan’s Lower and Upper Peninsulas. It is hosted annually and draws swimmers from across the nation to take on the challenge of crossing a stunning yet unpredictable stretch of water.
Participants traverse the cool waters of Lake Huron, starting near Mackinaw City and finishing near the historic and picturesque Mackinac Island—an iconic destination steeped in charm and history.
Mackinac Island itself is a step back in time. Located in Lake Huron, this car-free island is synonymous with horse-drawn carriages, bicycles, and Victorian architecture. From the famed “Grand Hotel” to the rich culture of fudge-making (always a treat post-race!), Mackinac Island offers a unique escape that feels worlds away from the hustle of modern life.
The water temperature of the Mackinac Straits is another defining feature of this event. The average temperature during swim season hovers around a chilly mid-60s Fahrenheit (around 16-18°C). Coupled with the occasional strong currents and choppy waves, swimmers must be physically and mentally prepared to adapt to varying conditions. Wetsuits are encouraged, and proper acclimatization is key!
Preparing for an 8.2-Mile Swim
Training for a long-distance open-water swim isn’t just about logging hours in the pool or the open sea; it’s about building endurance, improving technique, and strengthening mental resilience. My time in the Caribbean offered clarity—both literally and figuratively. Swimming in crystal-clear water was invigorating, but it also allowed me to focus on my technique, sighting, and how my body responded to 30-minute swimming stretches.
As I return to pool training, I gradually increase my mileage and incorporate speed intervals and endurance sets to sharpen my skills. Pool training helps build discipline and replicates consistent race pacing, while open-water swims teach adaptability. Combining both is crucial when preparing for an event like the Mackinac Swim.
Following are some suggestions on training for the Mackinac Island Swim:
Progressive Overload— Gradually increase your training distance over time to avoid overtraining or injury.
Aim to build up to at least 80-90% of your target distance (6.5–7.5 miles) in a single training session as you approach the event.
Occasional Over-distance Training — Some swimmers benefit from doing one or two “over-distance” swims (e.g., 9–10 miles) during their training cycle. This can help build confidence and endurance. These swims should be spaced out and followed by adequate recovery.
Maximum Mileage in a Day — For most swimmers, 10–12 miles in a single day is a huge. But you can break it up by doing a double session (e.g., morning and evening swims), you might split the mileage (e.g., 6 miles in the morning, 4 in the evening).
Listen to Your Body — Pay attention to signs of fatigue, soreness, or overtraining. Quality is more important than quantity.
Incorporate rest days and recovery swims into your schedule.
Simulate Race Conditions — Practice swimming in open water to mimic race conditions, including currents, waves, and sighting.
Include long swims at your target pace to build endurance and confidence.
Why Mackinac Swim?
There’s a reason why people travel from all over to take part in this incredible event. The mix of history, challenging waters, and the sheer beauty of Mackinac Island makes it unlike any other swim. For me, it’s not just about the physical challenge but about testing my limits and celebrating the resilience that comes from taking on something extraordinary.
If you’ve been thinking about the Mackinac Swim, I hope this inspires you to take the plunge—pun intended! Whether swimming 8.2 miles or a shorter distance, the most important thing is showing up, giving your all, and enjoying every stroke. See you in the water!