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. Wisconsin's 250 Years of History: East Troy East Troy, WI
2. Pope Valley Hubcap King Pope Valley, CA
3. Soccer Time! Hughson, CA (2)
4. 602 Brewing Bastrop, TX
5. Brazos Valley Brewing Brenham, TX
6. Love Those Movies: Dark Water Los Angeles, CA
7. Elana Chivani - IV The Emporer ???, CA (4)
8. Boardner's 1942 Hollywood, CA
9. The Summit Register Portsmouth, VA
10. A fungus among us champaign, IL
11. Lucky Find springfield, IL
12. The Apple of my Pie Oakdale, CA

More new letterboxes

1. Poohsticks Toms River, NJ
2. GeeTeeBee Charity Events: Spirit of Spring 5K Tolland, CT
3. Just the Write Spot Simsbury, CT
4. I Double Dog DWARE Yew Simsbury, CT (1/2)
5. Fantastic Fairies Southbury, CT (2/5)
6. The Nike Shoe Oxford, CT
7. Nod On Avon, CT
8. Musso & Frank Grill 1919 Hollywood, CA
9. National Coffee Day 2025 - Espresso Glendale, CA
10. KandK's cache Carmel, NY (1/4)
11. Oregon Butterfly Crooked River Ranch, OR
12. The Summit Register Portsmouth, VA

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.