Letterboxing - Musharof Chy
Letterboxing North America WebRing
Links to dozens of forums and clue sites.
Yahoo! Groups: Letterboxing Northeast
Discussion group for the northeastern US.
Mark and Sue Pepe
Couple from Kensington, Connecticut describe activities in eleven states and the island of Aruba.
NeeDeep's State Stamp Letterboxes
Ambitious family project placing letterboxes in each state, patterned after the US quarters series.
Have Feet Will Travel
Introduction, contact details, and guidelines for letterboxing in the Dartmoor area.
Letterboxing North America
US-based portal offering FAQ, links, forums, and a members-only section where clues can be submitte...
Letterboxing Minnesota
Includes letterboxing basics and clues for Minnesota letterboxes.
I-95 Letterboxes
Clues to quick and easy letterboxes to find while traveling on Route I-95, from Maine to Florida.
First Finds
Posts first finds submitted by new US letterboxers, organized by state.
New England Area Letterboxing Gatherings
Mark and Sue's weblog of letterboxing events in New England.
History of Dartmoor Letterboxing
Account first published as "More Dartmoor Letterboxes" by Anne Swinscow in 1986.