Boring Lava Field

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Bob's Mountain in Washington State

The Boring Lava Field is an extinct Plio-Pleistocene volcanic zone with at least 32 cinder cones and small shield volcanoes lying within a radius of 13 miles (21 km²) 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 2.7 million years ago, and has been extinct for about 300,000 years.^{[citation needed]}

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

1 Oregon Vents
2 Washington Vents
3 Map
4 External links

[edit] Oregon Vents

Chamberlain Hill - Elevation 980 feet
Cook's Butte - Elevation 718 feet
Kelly Butte - Elevation 590 feet (near the interchange of SE Powell Boulevard and I-205 in Portland)
Mount Scott - Elevation 1,050 feet (named for Harvey W. Scott)
Mount Tabor - Elevation 641 feet (center of a large multi-use Portland city park)
Larch Mountain - Elevation 4,055 feet
Mount Sylvania - Elevation 958 feet
Powell Butte - Elevation 620 feet
Rocky Butte - Elevation 612 feet (stone tower with outstanding view of Portland)
Ross Mountain - Elevation 1,380 feet
Swede Hill - Elevation 995 feet
TV Hill - Elevation 1,275 feet
Walker Peak - Elevation 2,450 feet
Highland Butte - Elevation 1,594 feet (near Beavercreek, Oregon)

[edit] Washington Vents

Battleground Lake - Elevation 750 feet (miniature crater lake)
Bob's Mountain - Elevation 2,110 feet (contains intact summit crater)
Brunner Hill - Elevation 680 feet
Green Mountain - Elevation 804 feet (logged off during the First World War)
Mount Norway - Elevation 1,111 feet
Mount Pleasant - Elevation 1,010 feet
Mount Zion - Elevation 1465 feet
Nichol's Hill - Elevation 1,113 feet
Pohl's Hill - Elevation 1,395 feet
Prune Hill - Elevation 610 feet (overlooks Camas, Washington)

[edit] Map

USGS Map of Boring Lava Field

[edit] External links

USGS Information page for the Boring Lava Field

Volcanoes of Oregon v • d • e
High Cascades	Mt Hood \| Olallie Butte \| Mt Jefferson \| Three Fingered Jack \| Hogg Rock \| Hoodoo Butte \| Hayrick Butte \| Black Butte \| Mt Washington \| Belknap Crater \| Black Crater \| Three Sisters \| Broken Top \| Tumalo Mtn \| Mt Bachelor \| Maiden Peak \| Diamond Peak \| Howlock Mtn \| Mt Thielsen \| Mt Bailey \| Mt Mazama / Crater Lake \| Mt Scott \| Union Peak \| Pelican Butte \| Mt McLoughlin \| Aspen Butte
Western Cascades	Boring Lava Field (Mt Sylvania \| Mt Tabor \| Rocky Butte \| Powell Butte \| Larch Mtn)
Eastern Cascades	Pilot Butte \| Lava Butte \| Newberry Volcano \| Yamsay Mtn
Basin and Range	Big Hole \| Hole-in-the-Ground \| Fort Rock	Columbia Plateau	Columbia River Basalt Group