Leyden lies along the eastern edge of the Berkshires, bordered by Guilford, Vermont, to the north, Bernardston to the east, Greenfield to the south, and Colrain to the west. The majority of the town is forested, and the town has a small state forest and a wildlife management area within its borders. It has a total area of 18.0 square miles with a population of approximately 711.
Leyden State Forest, located on 61 acres between County and Beaver Meadow Roads, offers hunting, hiking and nature observing.
Green River, is a popular cold-water stream used by swimmers and anglers. The river, featuring deep pools, is well stocked with trout and is surrounded by scenic hills. It serves as the border between the towns of Leyden and Colrain, running along Green River Road.
Leyden Town Common, is used for picnics and outdoor activities.
Pearl Rhodes Elementary School, includes a baseball/softball field, tennis courts and playground. The surrounding eight acres offers fishing, hiking and horseback riding.