Mt Adams stratovolcano 50 km east of Mt St Helens volcano is the by volume second largest volcano of the Cascades Range, after Mt. Shasta.
Mount Adams is the center of a 200 km3 volcanic field. The andesitic-dacitic volcano was built by several overlapping cones. It is elongated along a NNW-SSE line and has a flat summit with an ice cap and more than 60 flank vents.
The upper region of Mount Adams comprises 10 glaciers, barren moraines, and alpine meadows. Below 2000 m elevation, most of the volcano is covered by dense forest.
Mt Adams is popular among climbers and hikers. The only settlements near the volcano are Trout Lake and Glenwood villages, which are the base for excursions during the summer months. The nearest larger towns are Yakima (85 km NE), Goldendale (65 km SE), White Salmon-Hood River (55 km S), and Portland-Vancouver (100 km SW).