- About Letterboxing
- Learn about getting started in this hobby and its history. Includes FAQs, message boards and search clues.
- Letterboxing Kids
- Includes a map-reading game, photo album, story and instructions for making rubber stamps.
- Letterboxing North America
- Includes a FAQ, links, glossary, and clues for letterboxes all over the United States.
- Silent Doug's Letterboxing Site
- Articles including getting started, outdoor ethics, a glossary, and an explanation of cryptic letterboxer codes. Also includes a list of boxes found and clues for boxes placed. Most clues are for boxes in the northeastern region of the United States.