Did female Mammoths have tusks or were they like current elephants where only the males do?
Mammoths lived on earth during the Pleistocene epoch, which is part of the geologic timescale that lasted from 1.81 million years ago to 11,550 years ago.
With Elephants, tusks although commonly associated to males, can be found on both male and females. Asian Elephant females could have small tusks, or perhaps no tusks at all, however both male and female African Elephants can have tusks that can grow in excess of 2 meters. The males tusks are still larger, and can grow over 3 meters in length!
Although it is considered that all elephants, including Mammoths and Asian Elephants evolved from African Elephants, today, Mammoths are extinct, and their closest distant cousin would be considered the Asian Elephant. When it comes to the tusks however, the Mammoth seems to have followed their roots closer to the African Elephant, where both male and females had quite large tusks.

