Charles Mears State Park is a public recreation area in the village of Pentwater, Oceana County, Michigan.

[4] The park originally comprised only 16 acres "strictly made up of lake sand.

"[5] In 1921, the vegetation that held the sand in place was disturbed during a grading process, resulting in a loss of sand to the winds, much to the annoyance of neighboring dwellers.

To cure the man-made problem, five tons of marsh hay were "evenly distributed and disked in."

[5] In addition to fishing, swimming, camping, and picnicking, the park offers a one-mile (1.6 km) hiking trail that ascends the Old Baldy sand dune.