Bronze plaque pointing out mountain peaks seen from Dee Wright Observatory at McKenzie Pass in the Cascade Mountains of Oregon, with North Sister and Middle Sister volcanic peaks in the distance.

three sisters north sister middle sister dee wright observatory mckenzie pass lava volcanoes volcano volcanic geology peaks cascade mountains oregon willamette national forest deschutes national forest us forest service usfs direction point pointer pointing sign plaque interpretive bronze pacific northwest pnw usa us usa us america american west western northwestern travel nature scenic landscape vertical