Eph’s Pond probably started out as a marshy swamp on the north side of the Williams College campus along the floodplain of the Hoosic River. In the 19th C. Stetson Road was constructed to connect Mission Park to the Boston & Main RR station on Cole Avenue. Stetson Road also served the Williams College farm which was situated on the floodplain and heights just to the south. In the process of road construction the intermittent creeks feeding the wetlands were dammed, forming Eph’s Pond, and an overflow outlet pipe leading directly to the Hoosic River was installed.
In the early 21st C. Eph’s Pond is an exceedingly shallow body of water ringed by cattails, sedges, rushes, and wetland grass marshes. On the north, east, and south sides of the pond are shrub and tree swamps with dogwoods, alder and willows. The pond is subjected to considerable sediment loading as the uplands to the south are eroded by the outfalls of several storm sewers.