Beltzville State Park is a 2,972.39-acre Pennsylvania state park in Franklin and Towamensing townships, Carbon County, Pennsylvania in the United States. The park opened in 1972, and was developed around the U.S. Army Corps of Engineers flood control project Beltzville Dam on Pohopoco Creek. The village of Big Creek Valley was vacated in 1966 to make way for Beltzville Lake. Beltzville Lake is a 951.5 acres with 19.8 miles of shoreline.