Looking up at Table Mountain from the slide area (Steve Hart)

Another look up (Steve Hart)

A fresher slide on Greenleaf Peak (Steve Hart)

• Hikes including this location:
  • Two Chiefs Trail Hike   (TH | <—   —> | LOG)

• Weather forecast: NWS/NOAA
• Maps: Oregon Hikers Maps Google Maps
• Latitude, Longitude: 45.68478, -121.96961
• Elevation: 1280 feet

Description

Table Mountain has been the site of many slides in the centuries since the Missoula Floods. The largest of these was somewhere between 1100 and 1700 (New geological evidence suggests the latter date). This slide removed the entire southern face of the mountain, damned the Columbia River and created the large, tumbled flat piece of land north of today's Bonneville Dam.

Since the big slide, there have been several smaller slides at Table Mountain and nearby Greenleaf Peak. These slides have created large aprons of loose material too fresh to support a forest. This location is where the abandoned road now known as the Two Chiefs Trail crosses the largest open slide zone.

More Links

• [andslides.usgs.gov/recent/archives/1999bonneville.php A New Look at an Old Landslide (USGS)]

Contributors

• Stevefromdodge (creator)