Geocaching: An Outdoor Adventure

There you are.

A thin ribbon of dirt unraveling from under your feet. Green-crowned trees towering over you. A small, mobile phone-sized device in your hand. The tang of wet soil in your nose. The song of a nearby creek in your ears.

There you are, the device seems to whisper. Of course, it would say that, as it is a global positioning system (GPS) unit. The unit is designed to tell you exactly where you are anywhere on the planet, with an accuracy of up to seven feet.

But what are you doing out there?

Searching for hidden treasure.

You are participating in a very popular outdoor recreation activity called geocaching. Geocaching is an outdoor activity in which participants use a GPS unit, a provided set of coordinates and other navigational techniques to find caches.

a hand holding a small GPS unit for geocaching
A hand holding a GPS unit while searching for caches

A cache is a container that can be filled with trade items, or “treasure.” These trade items can be informational cards, chips, little toys or even cheap jewelry. Once a cache has been found, the participant can trade an item of equal or greater value if they want to take something from the cache, and then sign a provided logbook.

This activity started in 2000 and has only become more popular since then. There are more than three million caches hidden on all seven continents (Yes, even Antarctica! Antarctica has 51 caches at this time.) and in 191 out of 193 countries. There have been more than half a billion “Found it!” logs recorded since the game started in 2000, and the number is rising.

There are more than a thousand caches hidden throughout Fairfax County. Any caches hidden on Park Authority property require approval from the Park Authority, and the cache owner is responsible for maintaining the cache and eventually removing/replacing it if it is no longer in good condition. Most caches shouldn’t be located too far off the trail, and may be hidden in logical places, such as under a log or inside of a hollow stump.

How do I get started? you seem to ask.

First, sign up for a free account on the geocaching website. The website provides updates from cache owners, nearby caches, coordinates and hints on how to find the cache. You can also download various geocaching apps to help you navigate to a cache, although be warned that many apps require you to pay first. An alternative would be to get a GPS unit from a sporting goods store or online. You can buy these devices used or brand new, and they offer up to seven feet accuracy.

a GPS unit sitting against a tree
A global positioning system (GPS) unit used for geocaching, the outdoor adventure in search of treasure (of little monetary value)

It is recommended to use the geocaching website, at least in the beginning, because the website will also provide you with ratings on the terrain and difficulty of the cache. For geocaching classes at Park Authority sites, caches with one or two-star difficulty ratings are typically used to ensure that the caches can be easily found by beginners.

There you are.

Walking in the forest, spring peepers’ songs in your ears, head turning this way and that way, your feet softly sinking in the dirt.

There, just over there.

You veer slightly off the trail, toward a log that has been there for years. And just beyond it…

There you are. And there it is. Found it!

Want to learn more about geocaching in Fairfax County Park Authority parks or maybe set up a cache of your own? Visit the Park Authority geocaching webpage.

Author Gina Sando is a naturalist at Lake Fairfax Park.

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About Fairfax County Park Authority

About Fairfax County Park Authority HISTORY: On December 6, 1950, the Fairfax County Board of Supervisors created the Fairfax County Park Authority. The Park Authority was authorized to make decisions concerning land acquisition, park development and operations in Fairfax County, Virginia. To date, 13 park bond referenda have been approved between 1959 and 2016. Today, the Park Authority has 427 parks on more than 23,000 acres of land. We offer 325 miles of trails, our most popular amenity. FACILITIES: The Park system is the primary public mechanism in Fairfax County for the preservation of environmentally sensitive land and resources, areas of historic significance and the provision of recreational facilities and services including: • Nine indoor RECenters with swimming pools, fitness rooms, gyms and class spaces. Cub Run features an indoor water park and on-site naturalist • Eight golf courses from par-3 to championship level, four driving ranges including the new state-of-the-art heated, covered range at Burke Lake Golf Center • Five nature and visitor centers. Also nine Off-Leash Dog Activity areas • Three lakefront parks including Lake Fairfax, Lake Accotink and Burke Lake, with campgrounds at Burke Lake and Lake Fairfax. The Water Mine Family Swimmin’ Hole at Lake Fairfax, Our Special Harbor Sprayground at Lee as well as an indoor water park at Cub Run RECenter • Clemyjontri Park, a fully accessible playground in Great Falls featuring two acres of family friendly fun and a carousel, as well as Chessie’s Big Backyard and a carousel at the Family Recreation Area at Lee District Park • An ice skating rink at Mount Vernon RECenter and the Skate Park in Wakefield Park adjacent to Audrey Moore RECenter • Kidwell Farm, a working farm of the 1930s-era at Frying Pan Farm Park in Herndon, now with historic carousel • Eight distinctive historic properties available for rent • A working grist mill at Colvin Run in Great Falls and a restored 18th century home at Sully Historic Site in Chantilly • A horticulture center at Green Spring Gardens in Annandale • Natural and cultural resources protected by the Natural Resource Management Plan and Cultural Resource Plans, plus an Invasive Management Area program that targets alien plants and utilizes volunteers in restoring native vegetation throughout our community • Picnic shelters, tennis courts, miniature golf courses, disc golf courses, off-leash dog parks, amphitheaters, a marina, kayaking/canoeing center • Provides 263 athletic fields, including 39 synthetic turf fields, and manages athletic field maintenance services at 417 school athletic fields. PARK AUTHORITY BOARD: A 12-member citizen board, appointed by the Fairfax County Board of Supervisors, sets policies and priorities for the Fairfax County Park Authority. Visit for Fairfax County Government's Comment Policy.

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