When our clear kayaks arrived at the Pennington Mine Lake boat landing, images of Wonder Woman’s invisible plane popped into my head.
It was always strange to see Wonder Woman free-floating through the sky in her stars-and-stripes ensemble, riding in that see-through craft. It looks a little weird, as well, to see paddlers seemingly glide on their butts across the deep water that fills this former taconite mine, part of central Minnesota’s sprawling Cuyuna Country State Recreation Area.
My husband, Bob, and I, in sandals and bucket hats, stepped into our vessels. The so-called Crystal Kayaks, imported from tropical Florida, aren’t as comfortable as traditional kayaks, with slightly elevated seats. But we could adjust how much we wanted to see below us by sitting cross-legged or by stretching out our legs across the transparent hull.
Just a few feet onto the water, with a full view of weeds and buried trees, the clear concept seemed brilliant.
“Stick to the edges,” I told Bob. I’d paddled Pennington Mine twice before and remembered how eerie it felt the first time I peered into its yawning depths. The 62-acre lake drops to 259 feet at its deepest point. Water clarity averages 26 feet down, according to the Department of Natural Resources.
My second outing here had been on a paddleboard, which was ideal for seeing the ghostly branches of underwater trees with sunfish flitting about not far from shore. It was fine until I lost my balance. The steep wooded shoreline didn’t make it easy to get back on a board.

On this sunny and unusually warm Oct. 1, we passed a few other kayakers and a paddleboarder with her black dog along for the float. Sitting in the Crystal Kayaks, brought to the area about two years ago by Cuyuna Outfitters, we paused along the sunniest shore to watch the parade of tiny bits drifting beneath us: bright yellow aspen leaves, bronze pine needles, warbly air bubbles.
We spotted a sunfish flitting below and debated how deep the lake trout must be. Other paddlers passed beneath a small bridge where mountain bikers sped across and continued to Mahnomen, Alstead and Arco mine lakes, which together with Pennington form a 7.4-mile water trail.