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. John Saunders Chase Cypress, TX
2. UH-McVea Cypress, TX
3. SMV GS Troop #20202 Letterbox #2 Elm Grove, WI
4. It keeps the doctor away Round Rock, TX
5. The Blue Bunny Torrington, CT
6. Old Rail Hiking Trail Series Slidell, LA (6)
7. Mill Creek Magic Dexter, MI
8. Churchill Fulshear Fulshear, TX
9. SMV Girl Scout Troop 20202 Box #1 Elm Grove, WI
10. Brownies First Box Chesterland, OH
11. Who wants a brownie? Springfield, MO
12. Waldman Environmental Center Fort Wayne, IN (3)

More new letterboxes

1. Egyptian Power Stamps Oakland, NJ (4/11)
2. Barn 1 Lincoln, RI
3. Great Spirit Box Rocheport, MO (2/2)
4. Burnet Bulldogs Burnet, TX
5. 350 Maine Kittery, ME
6. Number Nine Trolley Ellicott City, MD
7. What Exit, Route 21? ???, NJ
8. Heartbeat Road ???, NJ
9. In Search of La Llorona Borrego Springs, CA
10. Poker Chip: 2021 Las Vegas, NV
11. Able Baker Brewing Las Vegas, NV
12. Transylvania Pond Southbury, CT

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.