Elizabeth "Betsy" Cabot Sluder, 98, passed away peacefully at her home in Concord MA on December 11, 2018 due to complications from two strokes in quick succession. The first child of Ralph and Eleanor Bradley, she was born and raised in Boston. After graduating from Windsor School, she spent two years at Vassar College and completed her undergraduate degree at Radcliffe after marrying John Sluder in 1943. They were married for 51 years until his death in 1994. After starting her family in 1945 in Boston, she lived in Salinas CA, New York City, and Colorado Springs CO before settling down in Armonk (a village of North Castle NY) for 49 years. She was passionate about the world around her and developed a distinguished career in conservation and civic affairs. In this, she was talented in handling people of all sorts. She was a founding member of the North Castle League of Women voters in 1953, serving as its president in 1960 -1962 and president of the Westchester County chapter from 1969 – 1971. From 1962 through 2001 she was heavily involved in a variety of formal conservation programs; this included serving as Chair of the Westchester Environmental Management Council, Director of the Westchester Soil and Water Conservation District, and Chair of the North Castle Conservation Board from 1975 – 2001. Her leadership of the Conservation Board led to the mapping of all town wetlands, the establishment of wetland codes, and the curtailment of unsound, rapacious development. Over the years, she received many awards for her conservation accomplishments. Starting in the 1950's she was the driving force behind a campaign to acquire 70 acres of land for the first substantial park for Armonk. Despite political and financial setbacks, she organized public and private funds to acquire the land, which became the Whippoorwill Park. In recognition of her leadership, the park was renamed the "Betsy Sluder Nature Preserve" in 1999. She was an active member of The Herb Society of American for 56 years and served on the national board as treasurer, helping to modernize and streamline the accounting system. She also held various board positions in the New York Unit and later as secretary of the New England Unit. In 2001, she moved to Concord MA and continued her participation in the League of Women voters (a total of 63 years of participation) and her conservation efforts. She was awarded the National Park Service "Conservation Hero" Award in 2008 for her work related to the Sudbury, Assabet, and Concord Wild and Scenic Rivers. She was an expert and knowledgeable gardener with a lovely formal garden in Armonk that was included in the annual Garden Conservancy tours. She was particularly proud of her collection of roses and later worked with the Arnold Arboretum to enhance the Bradley Rosaceous Collection. The rose arbor was dedicated in her honor in 2011. She loved parties and was an outstanding cook in the French tradition. She even successfully cooked one night for James Beard! She is survived by her children Greenfield, Godfrey, and Eleanor (and their spouses Pat, Rie, and Richard respectively), five grandchildren, and five great-grandchildren as well as her brother John Bradley and her sister Hannah Henderson. A memorial service will be organized for late spring 2019. Donations in her memory can be made to any chapter of the League of Women Voters. Arrangements are under the care of Dee Funeral Home & Cremation Service of Concord.