Eagles Mere Sits At Over 2,100 Feet ElevationMost people do not realize that Eagles Mere, Pennsylvania is technically a mountain town. Eagles Mere Lake is one of those rare bodies of water that still looks the way lakes used to look before development took over. Walking through Eagles Mere feels a little like flipping through an architecture textbook from the late 1800s, except everything is real, lived-in, and beautifully maintained. Eagles Mere Was A Famous Summer Resort In The Late 1800sImage Credit: Doug Kerr, licensed under CC BY-SA 2.0. By the late 1800s, families from Philadelphia, Baltimore, Harrisburg, and other eastern cities were making their way to Eagles Mere, Pennsylvania every summer.