Rotary Park is an open lawn with a few shade trees. The Quinebaug River and a dramatic rock outcropping are natural features that distinguish this space. At the south end of the park is the Cargill Falls and at the north end is the Bridge Street bridge. Kennedy Memorial Drive defines the eastern boundary, with the river forming the western boundary.

A 12-car asphalt parking lot is located off Kennedy Memorial Drive. The dominant view upon entering the park is of a concrete stage adjacent to the river. The stage is rectangular in shape with a round, depressed platform in the center. Half of the platform projects forward.

The park is flat for most of its length, rising to a high point at the south end where the rock outcroppings are located. In front of the outcroppings are three flagpoles, which carry the U.S., Connecticut, and Rotary flags. On the highest point is the Connecticut historical marker. Behind the outcroppings to the south, partially obscured by a group of juniper shrubs, is a plaque honoring Dr. Robert Dinolt, who was instrumental in establishing the park through his work on the planning commission.

An asphalt sidewalk runs along the river for the length of the park. Along the walk are benches and light fixtures. Willow and plum trees have been planted along the edge. These trees, along with the natural vegetation, at times form a dense screen along the river.

A Rotary trailer has been set up several yards north of the stage. In the middle of the park, near Kennedy Memorial Drive, is a community signboard, a water fountain, and a bronze dedication plaque set within a triangular-shaped boulder. The plaque reads, "This park is dedicated to Rotarians throughout the world. In the spirit of brotherhood, Putnam Rotary and Rotary International came to the assistance of the people of Putnam when the flood of August 1955 devastated the city. Dedicated June 1966." A sign at the entrance to the parking lot reads, "Real happiness is helping others."

Types of vegetation in the park include willows, pin oaks, plums, honey locusts, pines, crabapples, and junipers. A row of mature weeping willows along the river was lost during a recent hurricane. Activities that take place in the park include summer band concerts, outdoor rallies, fishing derbies, and picnicking.