geocaching

Geocaching is a worldwide outdoor recreational activity in which participants use handheld GPS devices or smartphones to locate containers hidden by other players. A geocache is typically a waterproof container containing a logbook, sometimes small trinkets for trade. Hints, coordinates, and descriptions are shared on geocaching websites.

History: The activity began in 2000 after GPS accuracy improved and the U.S. government published more precise signals. Dave Ulmer hid the first cache in Oregon, inviting others to seek. The community grew rapidly and a central listing site, Geocaching.com, was established, alongside regional networks.

How it works: Participants register on a geocaching platform, search for caches using coordinates and clues, and sign the logbook when found. Caches vary by size from micro to large and can be traditional, multi-cache (with multiple stages), or mystery/puzzle caches. Some are earthcaches, educating about geology without a physical cache.

Equipment and etiquette: A basic setup includes a GPS-enabled device or smartphone, a pen, and sometimes small trinkets for trade. Cachers should respect private property, follow local laws, leave no damage, and log online after finding. When appropriate, replace the cache exactly as found and note any issues.

Community and safety: Geocaching has a large volunteer-driven community and hosts events. Caching can be done alone or with groups and varies in difficulty and terrain. Participants should consider weather, personal safety, and urban risk; avoid trespassing; seek permission when required.