Armstrong County topographic maps

Average elevation: 375 m

Average elevation: 286 m

Average elevation: 288 m

Keystone Lake (also known as Keystone Reservoir and Plum Creek Reservoir) is a reservoir in Armstrong County in the U.S. state of Pennsylvania. The elevation of Keystone Lake is 1,076 feet (328 m) above sea level.

Average elevation: 357 m

Average elevation: 325 m

Average elevation: 424 m

Average elevation: 331 m

Average elevation: 319 m

Average elevation: 384 m

Average elevation: 286 m

Average elevation: 333 m

Average elevation: 356 m

Average elevation: 339 m

Average elevation: 423 m

Average elevation: 388 m

Average elevation: 321 m

Average elevation: 365 m

Average elevation: 300 m

Average elevation: 347 m

Average elevation: 299 m