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Help: California

Help Home > Land Manager Policies > California

  1. California State Parks
  2. Midpeninsula Regional Open Space District


California State Parks


There aren't any known guidelines specifically for letterboxing, but they have developed guidelines for geocaching which would likely be applied to letterboxes as well. Most of it is the regular common sense stuff, but read the full details at Geocaching in State Park.

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Midpeninsula Regional Open Space District


The Midpeninsula Regional Open Space District has Geocaching guidelines that letterboxers are expected to follow. It's unclear how we are supposed to list letterboxes on the geocaching.com website like the rules require, however. If you plan to plant a letterbox within this area, it would be a good idea to talk with someone in authority about your plant first. This area includes the following parks:



Help Home > Land Manager Policies > California