Mexican officials flocked to the Izaguirre Ranch in the western state of Jalisco last week after volunteers flagged the findings at the site, operated by the New Generation Jalisco Cartel.
Past the estate's iron gates, officials found cremation ovens, bone fragments, hundreds of pairs of shoes, clothing, and even children's toys, raising fears that the cartel group might have carried out mass killings at the ranch.
Officials have found around 700 personal items at the site, but it remains unclear how many bodies were cremated there.
Police said they have found nearly 100 shell casings so far.
''The number of the victims that presumably could have been buried there is enormous,'' Eduardo Guerrero, a security analyst in Mexico City, told The New York Times
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. ''And it resurfaced the nightmarish reminder that Mexico is plagued with mass graves.''