Beginning at Calf Pasture Beach, the trail is on-road via bike lanes and shared roadway to the Maritime Aquarium. From the Aquarium, an off-road 10-foot-wide trail continues to Oyster Shell Park, up to Stepping Stones Museum and Lockwood Mathews Mansion and then on to Union Park. From Union Park, new off-road trail returns to the riverside and runs almost 2 miles to Deering Pond at Broad St.