On May 3, 2000, Dave Ulmer, a computer consultant, wanted to test the accuracy of GPS by hiding a navigational target in the woods near Beavercreek, Oregon. The finder would then have to locate the container with only the use of his or her GPS receiver. He shared the waypoint of his "stash" with the online community on sci.geo.satellite-nav.

THE REST IS HISTORY!

Celebrate 20 years of geocaching with JAGA's new 20-for-20 Series. As geocaches in the series are published, links to the cache pages and pins on the map will be revealed through the month of May 2020. Happy Birthday, Geocaching!

Series Caches

• 20-for-20: Geocaching Time Machine
• 20-for-20: Through the Years (A Challenge Cache)
• 20 for 20 I saw No Dam Beaver
• 20-for-20: The View Below Loop Lookout
• 20for20 Raise the Roof
• 20-for-20: Birthday Cake
• 20-for-20: Two Lakes
• 20 for 20 Indian Lake
• 20 for 20: Code in the Cove
• 20-for-20: (SGL Gates) Golden Bison
• 20for20 Original Stash Tribute
• 20 for 20: Social Distancing
• 20-for-20: Reach-in!
• 20-for-20: Twenty Years of Local Geocaching
• 20 for 20 Que Reservoir hike
• 20-for-20: This Series Needs a Wherigo!
• 20-for-20: Cemetery Battleship
• 20 for 20 SGL 50 walk
• 20 for 20 Custard's Last Cemetery
• 20 for 20: Out for a Hike

Click a cache name to see its location on the map. Links to the cache pages are available on each popped-up map pin.