Spent Memorial day climbing the rocks at Bilgers Rock, once again. Last time I was here was in 2007. Bilger's Rocks is a geological phenomenon of massive sandstone formations secretly nessled in the mountains of Central PA. Over 250 million years old. "The creation of the sandstone seen exposed at Bilger's Rocks was during the Carboniferous Period that lasted from 354 to 290 million years ago. The rocks exposed at Bilger's Rocks are the Homewood Formation of the Pottsville Group, dominantly sandstone of Pennsylvanian age." Wikipedia Bilgers Rock, Grampian PA