Sentinel Gap, Washington - Glacial Lake Missoula Flood Features on Waymarking.com

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.

Recent Visits/Logs:

Date Logged Log User Rating   06/08/2023 giacaches visited it 08/28/2022 CuriousKDB visited it 08/15/2022 The A-Team visited it 07/14/2020 duma332 visited it 06/17/2019 NlLS visited it 10/15/2012 petendot visited it 08/10/2011 Rose Red visited it 05/31/2010 The Inkwell visited it 09/23/2009 Volcanoguy visited it 03/17/2005 ArmyFamily4 visited it

View all visits/logs