No, the state of Maine was not a glacier. However, during the last ice age, which occurred approximately 2.6 million to 11,700 years ago, glaciers covered a significant portion of North America, including parts of Maine.

During this time, a massive ice sheet known as the Laurentide Ice Sheet extended from the Arctic region, covering much of Canada and parts of the northern United States. This ice sheet was responsible for shaping the landscape of Maine, as well as other regions it covered.

The glaciers that covered Maine were a part of this larger ice sheet. They moved slowly across the land, eroding the surface and leaving behind various landforms such as moraines, drumlins, and glacial lakes. These landforms can still be observed in Maine today, providing evidence of the glacial activity that once occurred.

For example, the state's numerous lakes, including Moosehead Lake and Sebago Lake, were formed by the melting of glaciers and subsequent filling with meltwater. The creation of these lakes is a direct result of the glacial activity in the region.

Additionally, the presence of glacial erratics, which are large boulders that were transported and deposited by glaciers, can be found throughout Maine. These erratics are often composed of rock types that are not native to the region, indicating that they were brought from distant locations by the moving glaciers.

While Maine was not entirely covered by ice during the last ice age, the presence of glaciers significantly influenced its landscape and left a lasting impact on the state's geography. Today, the glacial features and landforms serve as a reminder of this ancient period of glaciation.

References:

1. Maine Geological Survey. (n.d.). Glacial Geology of Maine. Retrieved from https://www.maine.gov/dacf/mgs/explore/maine_geology/earthquakes/faq/glacial_geology.htm
2. University of Maine. (n.d.). Ice Age and Glaciers. Retrieved from https://umaine.edu/mainegeology/ice-age-and-glaciers/