Briar Creek Reservoir, Reservoir in Briar Creek Township, Columbia County, Pennsylvania, US

Briar Creek Reservoir is a 51.04-acre lake on East Branch Briar Creek in southwestern Briar Creek Township, Columbia County, Pennsylvania, west of Berwick off the Berwick-Evansville Road. It is held back by the Briar Creek Dam, an earth structure planned at 37 feet high, and has a distinct channel meandering west-northwest to east-southeast with gradual, rounded shoreline points. Shale surrounds it almost entirely, with a band of limestone to the south.

The reservoir was built in the early 1970s as a flood control project following feasibility studies in 1966. The area previously held 19th-century farms, including Franklin Fester's homestead, which were displaced when the earth dam was constructed to manage water flow in the region.

The reservoir takes its name from East Branch Briar Creek, which it dams; it was long known as Evansville Lake. The Fowlersville Covered Bridge has stood beside the water since 1986. The Pennsylvania Fish and Boat Commission placed turtle basking platforms and porcupine cribs in the lake as fish habitat, and weddings have been held near the shore.

Access is from the Berwick-Evansville Road in southwestern Briar Creek Township, west of Berwick. The lake has a boat ramp; only electric-motor or unpowered boats are allowed, and unpowered boats may be moored. The reservoir is Approved Trout Waters, so trout fishing is permitted year-round.

The lake holds porcupine cribs and turtle basking platforms placed as fish habitat, and a 2010 Pennsylvania Fish and Boat Commission electrofishing survey counted 645 yellow perch and 322 brown bullheads. Bald eagles, a threatened species, have been observed here, and sandhill cranes commonly visit during migration.