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. Goliad Massacre Goliad, TX
2. Angel of Goliad Goliad, TX
3. Letters to Santa Yuma, AZ
4. Old Alcalde - Texas Governor Series Austin, TX
5. Cookie Box Dunkirk, MD
6. Mother Thalia La Mirada, CA
7. Good Vibes Chattanooga, TN
8. Troop 53155 Alexandria, VA
9. Playground View Midlothian, VA
10. Scenic Wildflower Letterbox Midlothian, VA
11. Island Mystery Deltona, FL
12. Walking in the Woods Springfield, VA

More new letterboxes

1. Ahhh, Summer Monroe, CT (2/2)
2. Bear Notch Road Bartlett, NH
3. Flume Flow Lincoln, NH
4. Gallen Memorial Bridge Franconia, NH
5. REI (Rachel Elizabeth) Memorial #3: An Angel Gets Ayer, MA
6. Do Not Circulate Ayer, MA
7. Harvard Ivy Harvard, MA
8. Celtic Butterfly Old Lyme, CT (1/2)
9. Flying Around the Preserve Old Lyme, CT (2/3)
10. Celtic Butterfly Old Lyme, CT (1/2)
11. Flying Around the Preserve Old Lyme, CT (2/3)
12. WATCH 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.