There are two geocaching achievements that I feel many avid geocachers strive to complete - the Jasmer Challenge and the Fizzy Challenge.
The Jasmer Challenge
The Jasmer Challenge is a geocaching achievement that requires finding at least one geocache hidden in every calendar month since the beginning of the game in May 2000. The challenge is named after geocacher jasmerb, who created the first official Jasmer Challenge cache (GC1GBC1) in 2008, hidden near Mountain View, California.
To complete the challenge, the geocacher must fill a "Jasmer Grid"—a table where rows are years and columns are months.
Jasmer Challenge Grid Example
Because geocaching is ongoing, the challenge is "infinite." To maintain a completed status, a cacher must find a new geocache hidden in the current month every single month. The challenge becomes progressively harder to achieve due to the rarity of early caches.
Caches from the year 2000 are extremely rare, and there are fewer than 120 caches from that entire year still active worldwide. August 2000 is famously the hardest month to fill because only four active caches from that month and year remain in the world: three in the USA (Utah, Georgia, Michigan) and one in Sweden.
GC3B Potter's Pond (Utah)GC36 Geocache 612 (Michigan)GC21 Lake Lanier (Georgia)GC4D Match Stash (Stockholm, Sweden)
My Challenge -
As someone who enjoys accepting and conquering reasonable goals, I appreciate the clean feeling of crossing the finish line and moving on. Because the Jasmer Challenge keeps expanding every single month, I’ve decided to establish my own strict parameters for completion.
I will focus entirely on the original grid as it was laid out on the original Mystery Cache page: May 2000 through December 2008, totaling 104 historic months. And while only finding these 104 caches may seem to some cachers as not fulfilling the challenge, I will wrap up my epic journey by making my way to Mountain View, California, find and log the original challenge cache, GC1GBC1 The Jasmer Challenge, located right between San Francisco and San Jose, which is something only approximately 350 other geocachers have done.
My Current Challenge Status: (As of Jul 26, 2026)
- 2000 -
Jun,Jul, Aug, Sep, Oct, Nov, Dec - 2001 - Jan,
Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2002 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2003 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2004 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2005 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2006 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2007 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - 2008 -
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec - GC1GBC1 The Jasmer Challenge
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The Fizzy Challenge
The Fizzy Challenge, also known as the "81 Grid" or "Well-Rounded Cacher" challenge, is another popular geocaching milestone, which requires finding at least one geocache for every possible Difficulty and Terrain (D/T) combination, as well as finding at least one of each type of the following geocaches: EarthCache, Event Cache, Letterbox Hybrid, CITO Event, Multi-Cache, Traditional Cache, Unknown Cache, Virtual Cache, and Webcam Cache (APE and MEGA caches were excluded because they are "few and far between" and Locationless Caches have been phased out).
The challenge was named in honor of geocacher FizzyMagic, who created a statistics program that first generated the D/T matrix. The first actual challenge cache, Well Rounded Cacher (The Fizzy Challenge) (GC11E8N) was placed in California by the user Kealia.
Every geocache is rated on a 1–5 scale (with 0.5 increments) for both Difficulty (how hard it is to find/solve) and Terrain (how physically challenging it is to reach). In total, there are combinations (e.g., 1/1, 1.5/3, 5/5). The goal of this challenge is to "fill the grid" by posting a "Found It" or "Attended" log for at least one geocache or event in each of the 81 unique D/T slots.
Geocachers typically track their grid progress using the official Statistics tab on Geocaching.com (for Premium members) or third-party tools like Project-GC, which provides automated "challenge checkers" to verify qualifications.
My Current Challenge Status: (As of Jul 26, 2026)
NOTE: This geocache is a Premium Member only cache, and as of August 21, 2020 has been disabled due to the container being located in the heart of the CZU Lightning Complex Fire. Currently, Geocaching HQ has asked volunteer reviews to check in periodically for updates and the last entry from the Cache Owner stated that the area still hadn't been opened to non-residents of the area (March 2025), so the geocaching community waits for the geocache to be enabled again.