The Rocky Mountain Map Society is a non-profit organization dedicated to the study and appreciation of maps and other items of cartographic interest. The Society was formed in 1991 and is based in Denver, Colorado.

Most meetings are held on Tuesday evenings at the Denver Public Library, 5th Floor, Gates Room, at 5:30 PM.

January 24, 2017 – Dr. Don McGuirk:
"The journey of the “Yazoo Mingo” Moncacht-Apé and
its possible influence on the Lewis and Clark Expedition"


Dr. Don McGuirk
5:30 PM, Gates Room
Fifth Floor
Denver Public Library

Free & open to the Community


Moncacht-Apé was a Yazoo Indian interviewed by an early citizen of the Louisiana Colony, Antoine-Simon Le Page du Pratz, sometime between 1718 and 1734. Moncacht-Apé told him of completing travel to the Pacific Ocean and back, likely in the late 17th or early 18th century, 100 years before Lewis and Clark. On his return to Paris, Le Page du Pratz published a book that included the story of this Yazoo Indian. How this account affected the maps of North America and perhaps the very route of Lewis and Clark will be the subject of this PowerPoint presentation.

Dr. Donald L. McGuirk Jr. is a retired physician with a keen interest in early world maps, cartographic myths, and early exploration of the New World. He is a founding member and former president of the Rocky Mountain Map Society. He has been a member of the Philip Lee Phillips Map Society since its inception and a member of the Society for the History of Discoveries for over thirty years. Dr. McGuirk is a member, in long standing, of the Texas Map Society and the Washington Map Society. A summary of his cartographic publications can be found at:

Academia - Don McGuirk

Upcoming Meetings -- Save the dates!

Feb. 3-5, 2017

Miami International Map Fair
Sponsored by History Miami
Details at Miami Map Fair 2017


Announcements by RMMS Members

Naomi Heiser announces: "Mapping the Majestic: 100 Years of the National Park Service" at CU Boulder
Dates: August 22-December 16, 2016
Location: Earth Sciences & Map Library in Benson Earth Sciences on the CU Boulder campus
This exhibit celebrates the National Park Service’s 100th anniversary on August 25, 2016.

Lorraine Sherry announces "The Power of Maps -- Exploring the Magic of Maps"
The third biennial series of guest lectures by RMMS Members (some with antique map exhibits)
Dates: Thursday afternoons, February 23 to March 23, 2017 1:30-3:00 PM
Location: The Academy for Lifelong Learning
Classroom at: Calvary Baptist Church, 6500 East Girard Avenue, Denver CO 80224
Registration opens after January 1, 2017.

Plans are taking shape for RMMS' annual "Map Month 2017" at the Denver Public Library. The focus will be on maps as art. Meetings will take place in the B2 conference room on 4 or 5 Tuesday evenings at 5:30 PM during the month of May, 2017. Stay tuned for further details!

More About RMMS








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