Letterboxing is an intriguing “treasure hunt” style outdoor activity. Letterboxers hide small, weatherproof boxes in publicly-accessible places (like parks) and post clues to finding the box online on one of several Web sites. However, clues to finding some of the most highly-sought boxes are passed around by word of mouth.

There are about 60,000 active letterboxes listed on LbNA alone. Individual letterboxes usually contain a log book, an often hand-carved rubber stamp and occasionally contain an ink pad. Finders make an imprint of the letterbox’s stamp on their personal log book, and leave an imprint of their personal stamp on the letterbox’s logbook.

1. Mythology & Folklore Galore: Greek Sphinx Brookfield, WI
2. Juanita's Café 1944 Los Angeles, CA
3. Miniature Girl Scouts Kansas City, MO
4. Jarabek Trek San Diego, CA
5. Bless My Sausage Weimar, TX
6. Libraries Rock!-visit Webster Pubic Library Webster, NY
7. Half Moon Monroe, CT
8. Canadian Gator Okeechobee, FL

More new letterboxes

1. Der Schrei der Natur Marana, AZ
2. Pteridophyta:Equisetaceae:Equisetum hymale Summerhaven, AZ, AZ
3. Mt. Lemmon Aspen Mt Lemmon, AZ
4. Imperial Ocotillo, CA
5. Farenheit 451 Bradbury, CA
6. Fosselman's 1919 Alhambra, CA
7. Robert Falcon Scott Tucson, AZ
8. 1912 News Tucson, AZ (5/5)
9. Spirit Music Oro Valley, AZ
10. New England Sugar Shack Tucson, AZ
11. Half Moon Monroe, CT
12. Funny Business in the Desert Oro Valley, AZ (2/5)

I added a new column clue search results to show the estimated round-trip length of the hike for a clue. There is also a new option to search for a specific hike length.