The modern glacier attained its last maximum extent during the Little Ice Age, between 250 and 170 years ago (a period also known as the Matthes glaciation in the Sierra Nevada). It currently has an area of  and the glacier is  long and  wide. It is located between  and moves at a rate of  per year, although it is also retreating.
The modern glacier reached its maximum size during the Little Ice Age, roughly 250 to 170 years ago (a period also known as the Matthes glaciation in the Sierra Nevada). It currently covers an area of  and is long and wide. It lies between  and moves at a rate of  per year, although it is shrinking.