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Table Mountain Slide Area

From Oregon Hikers Field Guide

Looking up at Table Mountain from the slide area (Steve Hart)
Another look up (Steve Hart)
A fresher slide on Greenleaf Peak (Steve Hart)


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.

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Oregon Hikers Field Guide is built as a collaborative effort by its user community. While we make every effort to fact-check, information found here should be considered anecdotal. You should cross-check against other references before planning a hike. Trail routing and conditions are subject to change. Please contact us if you notice errors on this page.

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