Photograph of a view of Mount Hood overlooking Hood River, Oregon, [s.d.]. Markers or poles jut above the surface of the water in the river. Trees cover the area around the edges of the river. Beyond the trees is a community of houses and buildings. Most of Mount Hood is covered in snow and is visible in the distance.; "Mount Hood (45.4N, 121.7W) is the tallest mountain in Oregon (11,237 feet, 3,426 m) and popular with skiers, hikers, and climbers. It is 45 miles (75 km) east-southeast of Portland, Oregon. Mount Hood is a stratovolcano made of lava flows, domes, and volcaniclastic deposits. Most of the volcano is andesite composition. The main cone of Mount Hood formed about 500,000 years ago. In the last 15,000 years the volcano has had four eruptive periods. During the most recent eruptive period, 250-180 years ago, lava domes collapsed and produced numerous pyroclastic flows and lahars, which buried the southwest flank of the mountain. Crater Rock, a prominent rocky pinnacle just below the summit, is the most recent lava dome. Similar eruptions in the future pose the greatest risk to communities on the flank of the volcano." -- unknown author.