- Catbead Mischief
 - Offers clues for letterboxes in the Syracuse, NY, area. - Chowder's Letterbox Page
- Find out where in Southern California Chowder, a Chow and Golden Retriever mix, and her caretakers have placed their letterboxes.
- Fleur de Lis' Letterboxing Journal
- Personal log of letterboxing adventures and experiences around the North East U.S.
- Letterboxes of the Doubtful Guests
- Clues for finding boxes stashed away in Virginia, Washington D.C., New York, Massachusetts, and Florida.
- Letterboxing Minnesota
- Clues and maps for locating letterboxes in Minnesota. Also offers tips on putting a letterbox together.
- Letterboxing With Mark & Sue
- Personal log that also lists newbie survival tips, information on Dartmore letterboxing, New England area letterboxing gatherings, other letterboxing how-to's.
- Letterboxing With the Casco Bay Painter
- Clues to finding boxes around Portland, Maine.
- Letterboxing With Wanda and Pete
- Provides clues to their traditional letterboxes in Rhode Island and information about travelling letterboxes referred to as "hitchhikers."
- Perfect Circle Letterboxing Guild
- Private group of old friends and family members, based in New Jersey, who enjoy the hobby of letterboxing.
- Stamp-in-the-Box
- Log of a letterboxing enthusiast in West Michigan with clues to local boxes and stamp carving advice.
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