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Glacial Valleys
in Oregon Historical Markers
Geologic history sign at Glacial Valleys Viewpoint on West Rim Drive.
posted by: Volcanoguy
location: Oregon
date approved: 11/07/2009
last visited: 11/27/2020
SW2.3 km
Before The Collapse
Geologic history sign at Wizard Island Overlook on West Rim Drive.
date approved: 11/06/2009
After The Collapse
SW2.7 km
Bottomless Lake?
Sign about the 1886 expedition to measure the depth of Crater Lake.
date approved: 09/09/2009
SW3.2 km
Cascade Volcanoes
Geologic history sign on Wet Rim Drive about Cascade Volcanoes visible to the south.
S4.8 km
Discovery Point
History sign on West Rim Drive about the discovery of Crater Lake.
date approved: 11/05/2009
S5.8 km
Mt. Mazama (2)
One of two identical geologic history signs about Mt. Mazama in the Rim Village area at Crater Lake N.P.
Prelude to the Big One - Crater Lake, OR
One of a few signs at Sinnott Memorial Overlook in Crater Lake National Park. Many of the plaque here deal with the lake's geological history.
posted by: saopaulo1
date approved: 08/13/2018
You are inside a volcano - Crater Lake, OR
From the Depth - Crater Lake, OR
Anchored in Time - Crater Lake, OR
The Filling of the Lake - Creater Lake, OR
Castle on the Cliff - Crater Lake, OR
The Aftermath - Crater Lake, OR
Rising From the Ashes - Crater Lake, OR
Mt. Mazama (1)
N7.7 km
Pumice Desert
Geologic history sign at the Pumice Desert Viewpoint along the North Entrance Road.
last visited: 05/06/2023
SE8.7 km
Phantom Ship
Geologic history sign at the Phantom Ship Overlook.
date approved: 11/10/2009
last visited: 07/13/2013
E8.9 km
The Lake in Legend
History sign at Skell Head about “The Lake in Legend”.
SE9 km
Pumice Castle
Geologic history sign about the Pumice Castle.
last visited: 07/27/2021
E10.3 km
Mount Scott
Geologic history sign about Mount Scott.
S10.5 km
Pacific Crest Trail - Crater Lake National Park - Crater Lake, OR
A plaque along the Pacific Crest Trail at Crater Lake NP.
date approved: 08/24/2018
last visited: never
S11.7 km
Fossil Fumaroles
Geologic history sign about the formation of fossil fumaroles along Annie Creek.
date approved: 11/04/2009
N15.1 km
One Violent Moment
One of two geologic history sign at the Crater Rim Viewpoint on Ore. Hwy. 230.
date approved: 11/23/2009
last visited: 08/28/2009
When the “Dust” Settled...