» Letterboxing North America    US-based portal offering FAQ, links, forums, and a members-only section where clues can be submitted.    http://www.letterboxing.org/

» Letterboxing North America WebRing    Links to dozens of forums and clue sites.    http://www.webring.com/hub?ring=letterboxingnort

» About.com: Letterboxing and Geocaching Attract Walkers    Article describing the basics and the factors that motivate people to start letterboxing.    http://walking.about.com/cs/walksamerica/a/letterboxing.htm

» Aisling Dart    Artist from Salem, Massachusetts describes her boxes.    http://www.aisling.net/lb/MA/salem.htm

» Atlas Quest Letterboxing    Trip planning portal offers clue search by country as well as tutorials and premium members services.    http://www.atlasquest.com/

» British Columbia Letterboxes    Introduction, photographs of personal stamps, and clues for boxes planted in southwest British Columbia.    http://www.ajaster.com/letterboxing/

» Buckaroo's Letterboxing    Clues for boxes she planted in Washington and Massachusetts.    http://sophia.smith.edu/~rlay/letterboxing.htm

» Catbead Mischief    Offering clues for letterboxes in the Syracuse, New York area.    http://www.catbeadmischief.com/

» Chowder's Southern California Letterboxes    Search for boxes in Long Beach, San Bernardino and Lake Arrowhead, California.    http://home.earthlink.net/~letterboxes

» Chuck's Letterboxing    Chuck and Molly's letterboxes in Connecticut.    http://www.chuckstraub.com/Letterboxing/connecticut_letterboxes.htm

» Dartmoor Letterboxes    Introduction, tips and things to avoid, news, survey, and letterbox clues for the Dartmoor area.    http://www.plympton.info/dartmoor/

» Dartmoor Letterboxing    Includes a forum, image gallery, map of the area, contact details, and the history of the activity.    http://www.dartmoorletterboxing.org

» Der Mad Stamper    Rubber stamp carver Mitch offers instructions on how to carve a stamp, and some examples.    http://members.aol.com/Letterboxr/

» Dutch Letterbox Site    Clues for boxes in Dartmoor and in the Netherlands. [English and Dutch]    http://home.wanadoo.nl/letterboxing/engels.htm

» First Finds    Posts first finds submitted by new US letterboxers, organized by state.    http://firstfinds.blogspot.com/

» Fish and Chips' Letterboxing Paradise    Virtual letterbox clues lead visitors on an online hunt.    http://www.geocities.com/imacoldplaya/index.htm

» Fleur de Lis' Letterboxing Journal    Weblog about his letterboxing hobby.    http://fleurdelislb.blogspot.com/

» Fox News: Letterboxing Makes Hiking an Adventure    Feature story datelined Oakland, New Jersey.    http://www.foxnews.com/story/0,2933,55367,00.html

» Fudrick's Letterboxing Travails    Clues to letterboxes he has placed, mostly in the Northwest US.    http://www.geocities.com/fudrickus/index.html

» Have Feet Will Travel    Introduction, contact details, and guidelines for letterboxing in the Dartmoor area.    http://easyweb.easynet.co.uk/~have.feet/boxing/boxing.html

» History of Dartmoor Letterboxing    Account first published as "More Dartmoor Letterboxes" by Anne Swinscow in 1986.    http://dartmoorhistory.blogspot.com/

» I-95 Letterboxes    Clues to quick and easy letterboxes to find while traveling on Route I-95, from Maine to Florida.    http://i95boxing.blogspot.com/

» Kansas Letterboxes    Clues for letterboxes located in Kansas.    http://www.angelfire.com/oz/kansas_letterboxes/

» Letterboxers Anonymous    Forum with clues and discussion topics. Includes helpful hints on methods and supplies.    http://www.leecomputers.com/letterboxing/

» Letterboxing Germany    Clues for Germany and other European countries. Includes photos and tips. [English, German]    http://www.letterboxing-germany.de/

» Letterboxing Minnesota    Includes letterboxing basics and clues for Minnesota letterboxes.    http://www.littlekeylime.com/letterboxingmn.html

» Letterboxing Northeast    The Drew family of East Lyme, Connecticut, offer clues in New England states as well as Washington, DC, South Carolina, and Colorado.    http://hometown.aol.com/drewclan/

» Letterboxing Questionnaire    British university student studying letterboxing for her dissertation asks visitors to answer a few questions on the activity.    http://homepage.ntlworld.com/chris.donovan10/

» Mark and Sue Pepe    Couple from Kensington, Connecticut describe activities in eleven states and the island of Aruba.    http://markandsuepepe.blogspot.com/

» Massachusetts Letterboxes    Bonnie and Betsey Sennott offer clues to their boxes in Massachusetts.    http://users.crocker.com/~bsennott/letterbox.html

» MommaFox and Bald Eagle    Anna and Paul offer clues to boxes in Connecticut, Massachusetts and Vermont.    http://www.geocities.com/mommafox@snet.net/index.html

» NPR : Letterboxing    Radio host Linda Wertheimer and Thomas Johnston, an enthusiast in Washington, D.C., find a letterbox near the White House. [audio]    http://www.npr.org/templates/story/story.php?storyId=1832303

» NeeDeep's State Stamp Letterboxes    Ambitious family project placing letterboxes in each state, patterned after the US quarters series.    http://statestamp.blogspot.com/

» New England Area Letterboxing Gatherings    Mark and Sue's weblog of letterboxing events in New England.    http://gatherings.blogspot.com/

» New Zealand Letterboxing    Clues, views, and news including boxes from Team Psychokiwi, Judi, Linton, and the Bunny.    http://www.psychokiwi.org/letterboxing/nzboxing.htm

» Oklahoma City Letterboxes by Dennis Williams    Clues to boxes in Oklahoma City as well as New Mexico, Alabama, and Costa Rica.    http://david.snu.edu/~dwilliam/geog1113/okcboxes.htm

» Perfect Circle Letterboxing Guild    Family and friends offer clues to letterboxes in New Jersey and Pennsylvania.    http://www.pcdx.com/pclg/index.htm

» 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.    http://www.geocities.com/rscarpen/Lb/

» 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.    http://www.letterboxing.info/

» Silver Eagle's Letterbox Aerie    Clues to nearly 100 letterboxes that Silver Eagle has placed in North America, primarily in Texas.    http://www.geocities.com/sileagle1/index.html

» The Gazette: Letterboxing a Hobby of Inky Fingers and Hidden Treasures    Article on local letterboxing from chain of community newspapers near Washington, DC.    http://gazette.net/gazette_archive/2003/200328/damascus/news/167006-1.html

» The Space Traveler    Family offers clues for Pennsylvania, New York and other states.    http://www.enter.net/~space/Pages/Letterboxchart.html

» Twograysquirrels Letterboxes    Clues to letterboxes placed by twograysquirrels, mostly in Maryland and Virginia.    http://hometown.aol.com/twograysquirrels/index.html

» Urban Letterboxing    Database of clues to letterboxes in urban locations, primarily in Europe.    http://spacehijackers.co.uk/letterboxing/

» 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.    http://alum.wpi.edu/~p_miner/Letterboxes.html

» Washington Post: Thinking Inside the Box    Article by Caroline Kettlewell describes her discovery of the activity.    http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&node=&contentId=A55308-2002Jul11

» What is Letterboxing?    Michelle Spalding offers a history of letterboxing in England and the United States with bibliography.    http://www.gigagraphica.com/Michelle/letrbox.html

» Yahoo! Groups: Letterboxing Northeast    Discussion group for the northeastern US.    http://groups.yahoo.com/group/LbNE/

» Yahoo! Groups: Letterboxing USA    Discussion group for US letterboxers.    http://groups.yahoo.com/group/letterbox-usa/