Boring

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The Boring Lava Field is an extinct Plio-Pleistocene volcanic field zone with at least 32 cinder cones and small shield volcanoes lying within a radius of 13 miles of Kelly Butte, which is approximately 4 miles east of downtown Portland, Oregon, in the United States. The name is derived from the town of Boring, Oregon, which lies just to the southeast of the most dense cluster of lava vents. The zone became active at least 2.7 million years ago, and has been extinct for about 300,000 years.

The Portland metropolitan area, including suburbs, is one of the few places in the continental United States to have extinct volcanoes within a city's limits; Bend, Oregon is another.

Locations of Boring vents:

Oregon vents

The following vents are in Oregon:

  • Chamberlain Hill - Elevation 890 ft
  • Cook's Butte - Elevation 718 ft
  • Highland Butte - Elevation 1594 ft (near Beavercreek, Oregon)
  • Kelly Butte - Elevation 400 ft (near the interchange of SE Powell Boulevard and I-205 in Portland
  • Larch Mountain - Elevation 4061
  • Powell Butte - Elevation 614
  • Rocky Butte - Elevation 612 ft
  • Ross Mountain - Elevation 1380 ft
  • Swede Hill - Elevation 995 ft
  • Mount Scott - Elevation 1093 ft
  • Mount Sylvania - Elevation 978 ft
  • Mount Tabor - Elevation 630 ft
  • Mount Talbert - Elevation 715 ft
  • TV Hill - Elevation 1275 ft
  • Walker Peak - Elevation 2450 ft

Washington vents

The following vents are in Washington:

  • Battle Ground Lake State Park - Elevation 750 ft (miniature crater lake)
  • Bob's Mountain - Elevation 2110 ft (contains intact summit crater)
  • Bob's Mountain (N) - Elevation 1775 ft
  • Bob's Mountain (S) - Elevation 1690 ft
  • Brunner Hill - Elevation 680 ft (2 vents)
  • Green Mountain - Elevation 804 ft (logged off during World War I
  • Mount Norway - Elevation 1111 ft
  • Mount Pleasant - Elevation 1010 ft
  • Mount Zion - Elevation 1465 ft
  • Nichol's Hill - Elevation 1113 ft
  • Pohl's Hill - Elevation 1395 ft
  • Prune Hill (W) - Elevation 555 ft
  • Prune Hill (E) - Elevation 610 ft
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