Sentinel Gap, Washington
Posted by: Groundspeak Premium Member Rose Red
N 46° 57.824 W 119° 57.891
11T E 274449 N 5205401
According to Bruce Bjornstad’s “On the Trail of the Ice Age Floods," Sentinel Gap is a flood-enlarged gap of the Columbia River cut through the Saddle Mountains anticline.
Waymark Code: WM4E2R
Location: Washington, United States
Date Posted: 08/11/2008
Published By:Groundspeak Premium Member Blue J Wenatchee
Views: 65

According to Bruce Bjornstad’s “On the Trail of the Ice Age Floods," Sentinel Gap is a flood-enlarged gap of the Columbia River cut through the west end of the Saddle Mountains. It is located along SR 243 about five miles south of Wanapum Dam. During the Ice Age flooding, Sentinel Gap was one of four major routes for floodwaters entering Pasco Basin. After passing through Sentinel Gap, floodwaters expanded and decelerated. According to J Harlen Bretz, a deep hole exists in the channel beneath Sentinel Gap, perhaps a result of whirlpool-like turbulent forces during flooding. The coordinates are the viewpoint north of the Vantage Bridge.
Visit Instructions:
You must actually visit a feature to post a log for it. You must post a picture that you have taken at the feature to have the waymark approved. It has to be in one of the states listed above.
Search for...
Geocaching.com Google Map
Google Maps
MapQuest
Bing Maps
Nearest Waymarks
Nearest Glacial Lake Missoula Flood Features
Nearest Geocaches
Create a scavenger hunt using this waymark as the center point
Recent Visits/Logs:
Date Logged Log User Rating  
giacaches visited Sentinel Gap, Washington 06/08/2023 giacaches visited it
CuriousKDB visited Sentinel Gap, Washington 08/28/2022 CuriousKDB visited it
The A-Team visited Sentinel Gap, Washington 08/15/2022 The A-Team visited it
duma332 visited Sentinel Gap, Washington 07/14/2020 duma332 visited it
NlLS visited Sentinel Gap, Washington 06/17/2019 NlLS visited it
petendot visited Sentinel Gap, Washington 10/15/2012 petendot visited it
Rose Red visited Sentinel Gap, Washington 08/10/2011 Rose Red visited it
The Inkwell visited Sentinel Gap, Washington 05/31/2010 The Inkwell visited it
Volcanoguy visited Sentinel Gap, Washington 09/23/2009 Volcanoguy visited it
ArmyFamily4 visited Sentinel Gap, Washington 03/17/2005 ArmyFamily4 visited it

View all visits/logs