New GPS-linked caches are to help celebrate next year's 100th anniversary of National Park Service.

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Among observations of the upcoming 100th anniversary of the National Park Service, geocache hobbyists will have a field day around Mount Rainier National Park.

The Visit Rainier tourism association is partnering with Mount Rainier National Park and Washington State Geocaching Association to create an elaborate “geotour.”

Over the next two years, 100 new geocaches will be placed around Mount Rainier National Park and its gateway communities to celebrate the centennial of the National Park Service in 2016.

Geocaching is an outdoor “treasure” hunt using GPS-enabled devices. Participants navigate to a specific set of GPS coordinates and then attempt to find the geocache (container) hidden at that location.

Caches on the geotour will be released in four separate series, 25 at a time, with the first release at 4 p.m. on June 13, 2015, following a CITO (Cache in Trash Out) event at Mount Rainier National Park. A kick-off event will be held  3-5 p.m. at Whittaker Mountaineering/RMI in Ashford.  Passports, prizes and giveaways will be available.

The geotour will have its own page on, which will list all the geocaches. Each cache will contain a code word that participants may record in a passport (downloadable on When the passport contains all 25 code words, participants can turn it in for a trackable pathtag. A new pathtag will be available for each series. If a player logs all 100 caches, they can receive a commemorative geocoin.

For more information on the Visit Rainier Centennial GeoTour, see or on June 13.