| • | About.com: Letterboxing and Geocaching Attract Walkers - Article describing the basics and the factors that motivate people to start letterboxing. |
| • | Aisling Dart - Artist from Salem, Massachusetts describes her boxes. |
| • | All Info About Raising Boys: Letterboxing Family Fun - Brief article includes details on supplies and features instructions for participation with children. |
| • | Atlas Quest Letterboxing - Trip planning portal offers clue search by country as well as tutorials and premium members services. |
| • | Brett and Penny's Letterboxing Page - List of their boxes planted, found, and exchanged, primarily in Oregon and the Pacific Northwest. |
| • | British Columbia Letterboxes - Introduction, photographs of personal stamps, and clues for boxes planted in southwest British Columbia. |
| • | Buckaroo's Letterboxing - Clues for boxes she planted in Washington and Massachusetts. |
| • | Catbead Mischief - Offering clues for letterboxes in the Syracuse, New York area. |
| • | Chowder's Southern California Letterboxes - Search for boxes in Long Beach, San Bernardino and Lake Arrowhead, California. |
| • | Chuck's Letterboxing - Chuck and Molly's letterboxes in Connecticut. |
| • | Connecticut Department of Environmental Protection: Letterboxing - Official site supports letterboxing in publicly owned state forests. |
| • | Dartmoor Letterboxes - Introduction, tips and things to avoid, news, survey, and letterbox clues for the Dartmoor area. |
| • | DartmoorLetterboxing.org - History of the activity, similar to orienteering, begun in 1854 at Cranmere Pool on the moor, and now popular in many countries. Offers a forum and contact information. |
| • | Der Mad Stamper - Rubber stamp carver Mitch offers instructions on how to carve a stamp, and some examples. |
| • | Dutch Letterbox Site - Clues for boxes in Dartmoor and in the Netherlands. [English and Dutch] |
| • | First Finds - Posts first finds submitted by new US letterboxers, organized by state. |
| • | Fish and Chips' Letterboxing Paradise - Virtual letterbox clues lead visitors on an online hunt. |
| • | Fleur de Lis' Letterboxing Journal - Weblog about his letterboxing hobby. |
| • | Fox News: Letterboxing Makes Hiking an Adventure - Feature story datelined Oakland, New Jersey. |
| • | Fudrick's Letterboxing Travails - Clues to letterboxes he has placed, mostly in the Northwest US. |
| • | Have Feet Will Travel - Introduction, contact details, and guidelines for letterboxing in the Dartmoor area. |
| • | History of Dartmoor Letterboxing - Account first published as "More Dartmoor Letterboxes" by Anne Swinscow in 1986. |
| • | Hitchhiker List - Hitchhikers are a form of traveling letterbox. Site includes lists of hitchhikers and last reported letterbox location. |
| • | Holcomb Farm - Clues to boxes hidden in Granby, Connecticut. |
| • | I-95 Letterboxes - Clues to quick and easy letterboxes to find while traveling on Route I-95, from Maine to Florida. |
| • | Kansas Letterboxes - Clues for letterboxes located in Kansas. |
| • | Letterboxers Anonymous - Forum with clues and discussion topics. Includes helpful hints on methods and supplies. |
| • | Letterboxing Central - Introductory information, message board, resources, links to clues, and tips for letterboxing with dogs. |
| • | Letterboxing North America - US-based portal offering FAQ, links, forums, and a members-only section where clues can be submitted. |
| • | Letterboxing Northeast - The Drew family of East Lyme, Connecticut, offer clues in New England states as well as Washington, DC, South Carolina, and Colorado. |
| • | Letterboxing Questionnaire - British university student studying letterboxing for her dissertation asks visitors to answer a few questions on the activity. |
| • | Mark and Sue Pepe - Couple from Kensington, Connecticut describe activities in eleven states and the island of Aruba. |
| • | Massachusetts Letterboxes - Bonnie and Betsey Sennott offer clues to their boxes in Massachusetts. |
| • | Mirkwood's Letterboxing - Clues to boxes placed by Ruthann Zaroff and her family throughout Michigan, plus images of the stamps she created for them. |
| • | MommaFox and Bald Eagle - Anna and Paul offer clues to boxes in Connecticut, Massachusetts and Vermont. |
| • | Nebraska Letterboxing - Information about letterboxing in and around Nebraska. Includes clues and logs for local letterboxes, as well as some resources for letterboxing in general. |
| • | NeeDeep's State Stamp Letterboxes - Ambitious family project placing letterboxes in each state, patterned after the US quarters series. |
| • | New England Area Letterboxing Gatherings - Mark & Sue's blog of letterboxing events in New England. |
| • | New Zealand Letterboxing - Clues, views, and news including boxes from Team Psychokiwi, Judi, Linton, and the Bunny. |
| • | North America Webring - Links to dozens of forums and clue sites. |
| • | NPR : Letterboxing - Radio host Linda Wertheimer and Thomas Johnston, an enthusiast in Washington, D.C., find a letterbox near the White House. [audio] |
| • | Oklahoma City Letterboxes by Dennis Williams - Clues to boxes in Oklahoma City as well as New Mexico, Alabama, and Costa Rica. |
| • | Perfect Circle Letterboxing Guild - Family and friends offer clues to letterboxes in New Jersey and Pennsylvania. |
| • | Ryan's Letterboxes - Personal page with clues for boxes placed throughout the western United States, as well as a few in Canada, Africa, and Central America. Also includes tips for improving the stamp quality. |
| • | 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 New York and Pennsylvania. |
| • | Silver Eagle's Letterbox Aerie - Clues to nearly 100 letterboxes that Silver Eagle has placed in North America, primarily in Texas. |
| • | Smithsonian Magazine: They Live and Breathe Letterboxing - Abstract of an article by Chris Granstrom, with link to a few references. |
| • | Stamp-in-the-Box - A collection of information and clues relating to letterboxing, a hobby that combines hiking, art, orienteering and mystery in a treasure-hunt style activity. |
| • | Steve's History of Dartmoor Letterboxing - This Englishman from Torquay has written a brief history with a guide to the Tors and some examples of stamps. |
| • | The Space Traveler - Family offers clues for Pennsylvania, New York and other states. |
| • | The World of Letterboxing Community - Forums and worldwide clues database. |
| • | Twograysquirrels Letterboxes - Clues to letterboxes placed by twograysquirrels, mostly in Maryland and Virginia. |
| • | 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. |
| • | Washington Post: Thinking Inside the Box - Article by Caroline Kettlewell describes her discovery of the activity. |
| • | What is Letterboxing? - Michelle Spalding offers a history of letterboxing in England and the United States with bibliography. |
| • | Yahoo! Groups: Letterboxing Northeast - Discussion group for the northeastern US. |
| • | Yahoo! Groups: Letterboxing USA - Discussion group for US letterboxers. |
