Make Waves Wisely: Responsible Wake Boat Use on Walloon Lake

By Laura Morris
Director of Outreach & Community Engagement

It’s a hot, sunny day in Northern Michigan. You’ve waited all winter for this moment—the blue skies and sparkling water are calling. Cruising, tubing, water skiing, fishing, wake surfing—life on the lake is meant to be enjoyed. But as stewards of Walloon Lake, we also have a responsibility to understand how our boating choices affect the water beneath us and the health of the lake.

When it comes to powerboats, the impact from wake boats (especially in wake surfing mode) is far greater than many people realize. While shoreline erosion is the most visible effect, the ecological impact extends deep below the surface—affecting fish habitat, water clarity, and nutrient balance.

A recent University of Minnesota (UMN) field study evaluated how powerboats influence inland lakes. Researchers found that every motorized boat produces three types of hydrodynamic forces:

• Bow and stern waves — reach deep into the water column and move sediment.
• Gravity waves — large rolling waves that persist long after a boat passes.
• Propeller wash — a turbulent jet that can shear plants and stir sediment.

All boats create these forces, but wake boats amplify them dramatically.

Wake boats are engineered to create the largest, most powerful surfable wave possible. Ballast tanks, hull shape, and propulsion systems push more water deeper into the water column with far more energy than traditional boats.

This means that even when a wake boat is operated “far enough” from shore, it may still be impacting the lakebed, stirring nutrients, and sending large waves toward docks and natural shorelines.

The UMN study is the most comprehensive evaluation of wake boat impacts on inland lakes to date. It measures how wake-enhancing technologies change the movement of water throughout the entire water column—not just at the surface.

Unlike traditional boats, which send most of their force outward, wake boats push energy downward, increasing the likelihood of disturbing lakebed sediment, uprooting vegetation, and resuspending nutrients.

For Walloon Lake, this is especially important. While the lake has deep basins, its average depth is only 30 feet and it is relatively narrow. This means wake activity can easily affect the lakebed or send waves toward shorelines.

WLAC’s updated recommendations emphasize both minimum depth and minimum distance to protect water quality.

WLAC has created a Wake Boat Map highlighting areas where depth and distance make wake surfing more appropriate.
Even in these areas, boaters should remain aware of other vessels to ensure wakes remain at least 500 feet from others.

At WLAC, we understand the joy of boating in all its forms. By aligning our recommendations with the best available science,
we’re ensuring that wake sports can continue in ways that respect the lake’s ecology, its shorelines, and everyone who enjoys being on the water.

For more information, visit our safety page.