Thank you for your interest in the American Mammoth Jackstock Association. Within our website you will find everything you need ranging from history of this majestic breed, to articles about them, and forms and rules to register your own animals.


Here at the AMJA we've been processing registrations like crazy. We've even been receiving interest in registering animals in Mexico.

We've added a new board member: Dr. Marco Oviedo, Equine Reproductive Physiologist Specializing in Mammoth Donkey Reproduction. Dr. Oviedo reached out to us in regards to the genetics of the American Mammoth Jackstock.

April, 2022


The long winter is finally nearing a close, welcome to a hopeful spring. This will mean a lot of new beautiful babies being born. I so love seeing all the photos on Facebook. I am so thankful to those that continue to breed the true American Mammoth Jackstock. Hopefully one day the breed will no longer be endangered.

Just a note to let everyone know of our change of address. This new address will be posted on the contact page of this website, as well as on all downloadable forms.

The contact phone number is the same. I am happy to continue to answer any and all questions, as well as process registrations.

Best wishes to everyone.


Our condolences to the family of Dr. Oviedo who passed away on February 11, 2023.
Dr. Oviedo and his family have worked diligently to help preserve the American Mammoth Jackstock breed.
Best wishes to his family.

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