Robert Paul Stone (born March 10, 1951) is the author, photographer, and publisher of the trail guide series Day Hike Books.

In 1991, he began to write, publish, market, and distribute local trail guide booklets for Red Lodge and Yellowstone National Park.

[2] Subsequently, Stone left the real estate industry and devoted himself full-time to researching, writing, and publishing substantial trail guides.

Stone has written, revised, and published 31 guides for trails in Montana, Wyoming, Colorado, Arizona, California, and Hawaii, 20 of them currently in print and as eBooks.

Stone frequently updates his books, seeking new trails and improvements of previous editions.