Norumbega Reservoir is a high-level equalizing reservoir that is used to maintain a constant flow of water in the Hultman Aqueduct. The main basin (Norumbega Reservoir) was created by the construction of five earthen dikes and has an area of about 50 acres and a capacity of 150 million gallons. Shenk’s Pond, which serves as a trim weir, is a smaller basin, some 21 feet lower than the reservoir proper, that was developed in a natural pond of that name.

Between the two basins is an earthen dike, on which is located a granite, concrete, and steel gatehouse designed by the Boston firm of Densmore, LeClear, and Robbins, that contains screens and a chlorination facility. A chlorine storage building is located on the south edge of Schenck’s Pond. The reservoir area is naturally landscaped with conifers.

The AllTrails website has a description and map of a hike at Norumbega Reservoir.