LB Con - National letterboxing convention. List of events, tickets and merchandise, accommodations, and visitors guide..
Letterboxers Anonymous - Forum with clues and discussion topics. Includes helpful hints on methods and supplies..
Letterboxing Germany - Clues for Germany and other European countries. Includes photos and tips. [English, German].
Letterboxing Minnesota - Includes letterboxing basics and clues for Minnesota letterboxes..
Letterboxing Questionnaire - British university student studying letterboxing for her dissertation asks visitors to answer a few questions on the activity..
The Mapsurfer Treasureboxes - Challenging letterbox clues by Randy Hall, the author of The Letterboxing Companion..
Mark and Sue Pepe - Couple from Kensington, Connecticut describe activities in eleven states and the island of Aruba..
Silent Doug's Letterboxing Site - Articles including getting started, outdoor ethics, and explanation of cryptic letterboxer codes. Also includes list of boxes found and clues for boxes placed in the northeastern region of the United States..
The Space Traveler - Family offers clues for Pennsylvania, New York and other states..
Treasure Hikers - Incentive program for letterboxers based on miles hiked..
Urban Letterboxing - Database of clues to letterboxes in urban locations, primarily in Europe..
Wanda and Pete's Letterboxes - Clues for boxes placed primarily in Rhode Island, but a few in other states as well. Also includes logs of the movement of hitchhiker boxes, primarily in New England..
We Live and Breathe Letterboxing - Accounts, photographs, and memorabilia of the 2008 event as well as an online recreation of the letterboxing museum..
What is Letterboxing? - Michelle Spalding offers a history of letterboxing in England and the United States with bibliography..
New Times: Carved in Rubber - Introductory article by Ashley Schwellenbach featuring a letterboxer and the founder of Atlas Quest. (June 17, 2009).
NPR : Letterboxing - Radio host Linda Wertheimer and Thomas Johnston, an enthusiast in Washington, D.C., find a letterbox near the White House. [audio] (April 10, 2004).