Lake History
Lake Monomonac is a moderate-sized lake located in both Rindge, NH, and Winchendon, MA. About three miles long, it comprises about 711 acres, with 594 acres in New Hampshire and 183 acres in Massachusetts. Its maximum depth is 24 feet. Lake Monomonac is classified as a mesotrophic (middle-aged) lake with good water clarity. Lake recreation opportunities include swimming, boating, water skiing, canoeing and nature viewing. Loons have recently returned to the lake and have successfully nested, hatching young since 2022. A family of bald eagles has also claimed the area as home.
Lake Monomonac started as a small pond fed by several streams from the north in what is now known as Converse Meadows. It is within the Miller’s River watershed, where water from the Miller’s River flows into the Connecticut River and finally into the Atlantic Ocean. In the 1800s, dams constructed in Winchendon Springs raised the level of the then pond by about 12 feet. This dramatically increased its size and provided a volume, as well as “additional head,” of water to power many mills.
The closest mills were owned by the White family, who also acquired the dam and flowage rights of Lake Monomonac. Private ownership of the latter became contentious, as inadequate dam maintenance and control of the water levels affected every Lake Monomonac property owner, whether in MA or NH.
Today water levels are determined by the U.S. Army Corps of Engineers and are controlled by a dam and a spillway, both in the Massachusetts end of the lake. Click here for resources dam section.
The pronunciation and spelling of “Monomonac” has been, and still is today, a frequent topic of discussion. Variations exist depending on who you are speaking with and how long they have been in the area.
It is safe to say that it is of Indian origin, likely the Nipmuc tribe, who were early inhabitants of this area. It has been translated to mean “island and place.” Spellings include Wonomennock, Monomonock, Monomonoc and Monomonac.
Early Homes
Between 1870–1890, many urban dwellers sought relief from their industrial environment and vacationed in rural areas to get back to nature. As a result, some of the larger NH lakes, like Sunapee, Winnipesauke and Newfound, saw huge hotels built on their shores to accommodate these vacationers.
This occurred on a much smaller scale in Rindge, spurred on by the establishment of a West Rindge station of the Boston and Maine Railroad. Visitors arriving at the station were met by a stagecoach, where they and their luggage were driven to small inns, boarding houses or private homes offering rooms on or near the lake. Early activities included swimming, canoeing and rowing. Owners of lake-shore property enthusiastically lent their water frontage to vacationers as a way to supplement their income, derived mainly from farming or lumbering operations.
In 1874, the Gardner Gun Club (now called the Monadnock Sporting Club) rented shore-front property in Coot Bay from Gilman Wellington for members to enjoy tenting, fishing and water recreation. In 1905, the club bought five acres of land in Coot Bay and erected a large lodge, which is still in use today.
The first lake cottage, a sporting lodge named Algonquin, was built in 1883 on the east side of the lake, just north of what is known as Swan Point. Development soon followed around this area. Through the years, the Wellington families—who owned much of the shore property on the northeast side of the lake, from Coot Bay to what is now Rindge Acres beach—were instrumental in developing that area. In 1886, Henry Wellington erected the second lake building, intended for picnic parties and camping. Originally known as “The Pavilion at Wellington Grove,” it was later renamed “Acorn Lodge” and is currently owned by long-time residents Chip and Kathy Hastings.

Other early cottages were known as “Pocono Cottage,” “Audubon,” “Sweet Fern,” and “Cygnet.” Most of these original buildings remain today in one form or another.
The Santa Maria
No other home on the lake is more famous and well known as the Santa Maria. In 1937, Father Wilfred Tisdale, a Catholic priest from Winchendon, purchased land at the south end of the lake for a summer retreat. In 1942, using concrete and stones, he constructed a simulated ship’s bow, positioned as if ready to take sail into the lake. He named it the Santa Maria. Father Tisdale traveled extensively and used this home to store and display many artifacts and fine art brought back from his travels abroad. He constructed an altar inside and another outside, where he held summer Sunday mass for lake residents, some of whom came by boat and moored at his dock. After his passing, it changed ownership a few times and was rumored to have once been owned by singer Kenny Rogers.

Christ Church Camp
In the late 1880s, the Christ Episcopal Church in Fitchburg held picnics in Coot Bay on land rented from Henry Wellington. A small building was constructed to accommodate them. Shortly later, a second-floor sleeping loft was added.
After several years, the church purchased and moved to a large parcel of land (over 100 acres) on the east side of the lake and started building facilities for summer campers. It commenced operations in 1923 as a camp for boys and featured a boys’ and a men’s choir. Sometime in the 1950s, it added separate two-week sessions for girls. It became co-ed at some point in the 1970s.
Camp Starfish purchased the property in 1998. It is a summer-only camp offering a safe, fun, structured therapeutic experience for kids aged six to 22 who are experiencing social, emotional, behavioral or learning challenges. It is one of only a few summer camps to offer one-to-one camper-to-counselor enrollment.


Monomonac Lake Sailing Association (MLSA)
On July 12, 1952, 16 sailboat enthusiasts gathered for the first meeting of the recently formed MLSA. It was held on the beach in front of the Faulkners’ cottage (just south of Swan Point). They elected Roland (Rollie) Blake as the Association’s first Commodore and held their first race on July 20th, 1952. MLSA has been sponsoring and running races continuously since. Currently, the Association opens and closes each season with a combined business and social meeting, each a must-attend event. It publishes a yearly newsletter, Jib Sheet, for its members.
Most of the early boats on the lake were homemade Sunray sailboats. Today, commercially produced boats are popular, and a mix of Lasers, Sunfish, catamarans and others can be seen at the starting line on any given race day.
MLSA holds an annual blueberry pancake breakfast on what is known as Commodore Island. Gas grills and cooking supplies are transported to the island, where MLSA members prepare and serve breakfast. Diners arrive by boat for a to-go breakfast of pancakes, sausage, juice and coffee. The MLSA also sponsors an annual boat parade on July 4th.


Lake Monomonac Ice Out Dates
Francis, Laura and Stephen Gray have tracked Lake Monomonac ice-out dates for decades, and the data presented here are from their notes. The Grays declared “ice-out” when ice was no longer visible from north to south, including Coot Bay. Estimates by other long-time lake residents may vary by a few days, depending on their location on the lake.

Year | Date |
---|---|
2024 | March 7 |
2023 | April 5 |
2022 | March 24 |
2021 | March 26 |
2020 | March 15 |
2019 | April 14 |
2018 | — |
2017 | — |
2016 | March 9 |
2015 | — |
2014 | — |
2013 | — |
2012 | — |
2011 | April 13 |
2010 | March 30 |
2009 | April 2 |
2008 | May 14 |
2007 | April 20 |
2006 | March 28 |
2005 | April 10 |
2004 | April 12 |
2003 | April 17 |
2002 | March 9 |
2001 | May 22 |
2000 | March 22 |
1999 | April 1 |
1998 | March 30 |
1997 | April 10 |
1996 | April 3 |
1995 | March 25 |
1994 | April 16 |
1993 | April 18 |
1992 | April 8 |
1991 | March 29 |
1990 | April 3 |
1989 | April 1 |
1988 | April 6 |
1987 | April 4 |
1986 | April 2 |
1985 | March 29 |
1984 | April 16 |
1983 | April 5 |
1982 | April 21 |
1981 | March 31 |
1980 | April 10 |
1979 | April 18 |
1978 | April 23 |
1977 | April 13 |
1976 | April 1 |
1975 | April 21 |
1974 | March 12 |
1973 | March 29 |
1972 | April 28 |
1971 | April 19 |
1970 | — |
1969 | April 16 |
1968 | Dam repaired |
1967 | April 19 |
1966 | April 18 |
1965 | April 16 |
1964 | — |
1963 | — |
1962 | — |
1961 | — |
1960 | — |
1959 | — |
1958 | — |
1957 | April 6 |
1952 | April 29 |
1951 | April 9 |