The GeoTriad refers to a specific set of three geocache sites within the Pacific Northwest. Two are located in and around Seattle, WA, while one is located just outside of Portland, OR.


Attempting to complete the GeoTriad is a popular goal of geocachers traveling to the Seattle/Portland area. The three geocaches would be considered part of Geocaching history by many. They include:

There is a Challenge Cache dedicated to completing all three GeoTriad caches[1]


  1. ^ Shelrik's Center of the Triad Challenge
HQ logo

GCHQ logo

Gallery 210 3 1952016

Plaque to commemorate original stash.

Community content is available under CC-BY-SA unless otherwise noted.