Lyman Run State Park is a 595-acre Pennsylvania state park in Ulysses and West Branch Townships in Potter County, Pennsylvania in the United States. Lyman Run Lake is a 45-acre man-made lake within the park, surrounded by a northern hardwood forest of mainly maple and cherry trees.

The park is open every day of the year, sunrise to sunset. Day use areas close at dusk.

The park office is open specific hours. The beach, overnight areas, and other areas are open specific seasons and hours. Contact the park office for facility seasons and hours.

For more information on operating hours, visiting guidelines and admission rates please visit https://www.dcnr.pa.gov/StateParks/FindAPark/LymanRunStatePark/Pages/default.aspx or call +1 814-435-5010.