Lyon County State Lake, a 135-acre waterbody in eastern Kansas, sits within the Flint Hills region surrounded by 442 acres of public wildlife area. The lake features a single concrete boat ramp with a loading dock, providing the only formal water access point. The surrounding landscape consists of tallgrass prairie interspersed with wooded draws, creating a distinctive setting characteristic of the region.

The lake maintains good water clarity, averaging 39-66 inches of visibility, thanks to its 1,400-acre prairie drainage basin. Three rip-rapped islands dot the water's surface, offering interesting features to explore. The lake contains zebra mussels, requiring all boats to be cleaned, drained, and dried upon exit.

Facilities include primitive campgrounds, pit toilets, picnic tables, and a limestone shelter house constructed in 1951. The Clinton Eubank Memorial trail system runs along the southeast shore, offering opportunities to combine paddling with shoreline exploration. Seven rip-rapped fishing piers extend into the water and should be noted for navigation.

Wildlife viewing opportunities abound, particularly for bird enthusiasts. During migration seasons, waterfowl frequent the lake, and the surrounding area hosts various songbirds. The wooded sections harbor white-tailed deer and fox squirrels, while the prairie areas showcase native grassland species.

The lake's historical significance dates to 1931 when the state acquired the property. The Works Progress Administration and Civilian Conservation Corps constructed many features, including distinctive native limestone guard posts and rip-rap still visible on the dam and spillway.

Swimming is explicitly prohibited. The lake follows standard state boating regulations, and permits are required for all watercraft.